SECTION 1 1.
$.
'.
).
.
/.
0.
.
4.
C.
Maximum work work that could be secured by expandin expandin the as o!er a i!en pressure rane is the """""""""" work. A.
isothermal
B.
adiabatic
C.
isentropic
D.
none o# these
16.
11.
Internal enery enery chane chane o# o# a system o!er one complete complete cycle cycle in a cyclic process is
second
D.
third
5or a spontaneous process3 #ree enery enery A.
is -ero
B.
increases
C.
decreases whereas the entropy increases
D.
and entropy both decrease
2 re#rieration re#rieration cycle is is a re!ersed re!ersed heat enine. 7hich o# the #ollowin has the maximum !alue o# the co&e##icient o# per#ormance 8CO9: #or a i!en re#rieration e##ect ;
A.
zero
A.
*apor compression cycle usin expansion !al!e.
B.
%!e
B.
2ir re#rieration cycle.
C.
&!e
C.
*apor compression cycle usin expansion enine.
D.
dependent on the path
D.
Carnot refrigeration cycle.
(eatin o# water under atmospheric pressure is an """""""""" process. A.
isochoric
B.
isobaric
C.
adiabatic
D.
isothermal
1$.
*an +aar e,uation deals with the acti!ity co&e##icients in A.
binary solutions
B.
ternary solutions
C.
a-eotropic mixture only
D.
none o# these
speci#ic heat
B.
latent heat o# !aporisation
C.
viscosity
D.
speci#ic !apor !olume
A.
6
B.
<6
C.
<1
D.
>1
1'. """""""""" increases with increase increase in pressure. pressure.
(ih """""""""" is an undesirable property #or a ood ood re#rierant. A.
In a workin workin re#rierator3 re#rierator3 the the !alue o# CO9 is always
1).
Solubility o# a substance substance which dissol!es with an increase increase in !olume and liberation o# heat will be #a!oured by the
A.
The meltin point o# wax
B.
The boilin point o# a li,uid
C.
both (a and (b
D.
neither 8a: nor 8b:
2 re#rierator may be termed as a A.
heat pump
B.
heat enine
C.
Carnot enine
D.
none o# these
A.
low pressure and hih temperature.
B.
low pressure and low temperature.
C.
hih pressure and low temperature.
A.
decreases
D.
hih pressure and hih temperature.
B.
increases
C.
remains same
D.
decreases linearly
1.
Entropy is a measure o# the """""""""" o# a system. system.
5or a stable phase at constant pressure and temperature3 the #uacity o# each component in a binary system """""""""" as its mole #raction increases.
A.
disorder
B.
orderly beha!iour
C.
temperature chanes only
A.
Chemical potential
D.
none o# these
B.
Sur#ace tension
C.
!eat capacity
D.
None o# these
1/.
2 chemical reaction will occur spontaneously at constant constant pressure and temperature3 i# the #ree enery is
7hich o# the #ollowin is not an an intensi!e property ;
A.
-ero
B.
positi!e
C.
negative
A.
Air cycle
D.
none o# these
B.
Carnot cycle
C.
Ordinary !apour compression cycle
D.
*apour *apour compression with a re!ersible expansion enine
10. Out o# the #ollowin re#riration re#riration cycles3 which one has the minimum CO9 8Co&e##icient o# per#ormance:;
5undamental principle o# re#rieration is based on the """""""""" law o# thermodynamics. A.
-eroth
B.
#irst
1. Measurement o# thermodynamic property property o# temperature is #acilitated by """""""""" law o# thermodynamics.
A.
contracts
A.
1st
B.
expands
B.
zeroth
C.
does not chane in !olume
C.
'rd
D.
either 8a:3 8b: or 8c:
D.
none o# these
$/. A2t the absolute -ero temperature3 the entropy o# e!ery per#ectly crystalline substance becomes -eroA. This #ollows #rom the
14. The theoretical minimum work re,uired to separate one mole o# a li,uid mixture at 1 atm3 containin 6 mole = each o# n& heptane and n& octane into pure compounds each at 1 atm is A.
&$ RT ln ln 6.
A.
third law of thermodynamics
B.
"RT ln ln #.$
B.
second law o# thermodynamics
C.
6. RT
C.
Nernst heat theorem
D.
$ RT
D.
Maxwell@s relations
$6. >eepin the pressure pressure constant3 to double the !olume !olume o# a i!en i!en mass o# an ideal as at $0?C3 the temperature should be raised to """""""""" ?C. A.
$06
B.
%&'
C.
'66
D.
)6
$0. Burin oule&Thomson expansion o# ases
$1. Entropy o# an ideal as depends upon its
A.
pressure
B.
temperature
A.
enthalpy remains constant.
B.
entropy remains constant.
C.
temperature remains constant.
D.
none o# these.
$. & The accentric #actor o# a materical3 @D@3 is de#ined as D &lo 168P r rsat :T r r sat 6.03 where3 P r r reduced !apor pressure3 T r r reduced temperature. The !alue o# accentric #actor is always
1
C.
both (a (b
D.
neither 8a: nor 8b:
$$. Isobaric process means a constant process.
A.
temperature
B.
pressure
C.
!olume
D.
entropy
A.
F$
B.
*1
C.
F1
D.
<'
$4.
$'.
Beress o# #reedom at triple point will be
No work is done by the system3 when a reaction occurs at constant
A.
volume
B.
temperature
C.
pressure
D.
none o# these
A.
#
B.
1
C.
$
D.
'
'6. A+aw o# correspondin statesA says that
$). I# the !apour pressure at two temperatures o# a solid phase in e,uilibrium with its li,uid phase are known3 then the latent heat o# #usion can be calculated by the
A.
Maxwell@s e,uation
B.
Clayperon"Claussius e)uation
C.
*an +aar e,uation
D.
Nernst (eat Theorem
A.
two different gases behave similarly+ if their reduced properties (i (i .e. ,+ - and are same.
B.
the sur#ace o# separation 8i. e. the meniscus: between li,uid and !apour phase disappears at the critical temperature.
C.
no as can be li,ui#ied abo!e the critical temperature3 howsoe!er hih the pressure may be.
D.
the molar heat o# enery o# as at constant !olume should be nearly constant 8about ' calories:.
'1. +inde as li,ue#action process employs coolin
$. The #ree-in point o# a li,uid decreases when the pressure is increased3 i# the li,uid """""""""" while #ree-in.
A.
by throttling
B.
by expansion in an enine
1. Measurement o# thermodynamic property property o# temperature is #acilitated by """""""""" law o# thermodynamics.
A.
contracts
A.
1st
B.
expands
B.
zeroth
C.
does not chane in !olume
C.
'rd
D.
either 8a:3 8b: or 8c:
D.
none o# these
$/. A2t the absolute -ero temperature3 the entropy o# e!ery per#ectly crystalline substance becomes -eroA. This #ollows #rom the
14. The theoretical minimum work re,uired to separate one mole o# a li,uid mixture at 1 atm3 containin 6 mole = each o# n& heptane and n& octane into pure compounds each at 1 atm is A.
&$ RT ln ln 6.
A.
third law of thermodynamics
B.
"RT ln ln #.$
B.
second law o# thermodynamics
C.
6. RT
C.
Nernst heat theorem
D.
$ RT
D.
Maxwell@s relations
$6. >eepin the pressure pressure constant3 to double the !olume !olume o# a i!en i!en mass o# an ideal as at $0?C3 the temperature should be raised to """""""""" ?C. A.
$06
B.
%&'
C.
'66
D.
)6
$0. Burin oule&Thomson expansion o# ases
$1. Entropy o# an ideal as depends upon its
A.
pressure
B.
temperature
A.
enthalpy remains constant.
B.
entropy remains constant.
C.
temperature remains constant.
D.
none o# these.
$. & The accentric #actor o# a materical3 @D@3 is de#ined as D &lo 168P r rsat :T r r sat 6.03 where3 P r r reduced !apor pressure3 T r r reduced temperature. The !alue o# accentric #actor is always
1
C.
both (a (b
D.
neither 8a: nor 8b:
$$. Isobaric process means a constant process.
A.
temperature
B.
pressure
C.
!olume
D.
entropy
A.
F$
B.
*1
C.
F1
D.
<'
$4.
$'.
Beress o# #reedom at triple point will be
No work is done by the system3 when a reaction occurs at constant
A.
volume
B.
temperature
C.
pressure
D.
none o# these
A.
#
B.
1
C.
$
D.
'
'6. A+aw o# correspondin statesA says that
$). I# the !apour pressure at two temperatures o# a solid phase in e,uilibrium with its li,uid phase are known3 then the latent heat o# #usion can be calculated by the
A.
Maxwell@s e,uation
B.
Clayperon"Claussius e)uation
C.
*an +aar e,uation
D.
Nernst (eat Theorem
A.
two different gases behave similarly+ if their reduced properties (i (i .e. ,+ - and are same.
B.
the sur#ace o# separation 8i. e. the meniscus: between li,uid and !apour phase disappears at the critical temperature.
C.
no as can be li,ui#ied abo!e the critical temperature3 howsoe!er hih the pressure may be.
D.
the molar heat o# enery o# as at constant !olume should be nearly constant 8about ' calories:.
'1. +inde as li,ue#action process employs coolin
$. The #ree-in point o# a li,uid decreases when the pressure is increased3 i# the li,uid """""""""" while #ree-in.
A.
by throttling
B.
by expansion in an enine
C.
at constant pressure
D.
none o# these
'0. Out o# the #ollowin re#rieration cycles3 which one has maximum CO9 ;
'$. 9ick out the wron statement pertainin to the decomposition o#
A.
2ir cycle
9Cl represented by3 9Cl 9Cl will
B.
Carnot cycle
C.
Ordinary !apor compression cycle
D.
*apor compression with a re!ersible expansion enine
9Cl' % Cl$.Beree o# dissociation o#
A.
decrease on addition o# Cl $.
B.
increase on addition o# an inert as at constant pressure.
C.
decrease on increasin the pressure o# the system.
D.
none of these
'. 9ick out the correct statementJ
A.
In an isothermal system3 irre!ersible work is more than re!ersible work.
B.
0nder reversible conditions+ the adiabatic wor is less than isothermal wor.
C.
(eat3 work3 enthalpy and entropy are all @state # unctions@.
D.
Matter and enery can not be exchaned with the surroundins in a closed system.
''. oule&Thomson experiment is
A.
isobaric
B.
adiabatic
C.
isenthalpic
D.
both(b (c
'4. In any spontaneous process3
'). Goyle@s law #or ases states that
A. 3 when temperature is constant.
A.
only F decreases decreases
B.
only A only A decreases decreases
C.
both F and A and A decreases decreases
D.
both F and A and A increase increase
)6. B.
C.
7hich o# the #ollowin is a t hermodynamic property o# a system ;
+ when temperature mass of the gas remain constant. 9 ∝ *3 at constant temperature H mass o# the as.
A.
Concentration
B.
Mass
C.
Temperature
D.
2ntropy
)1.
D. constant3 #or any as.
E,uilibrium constant decreases as the temperature
'. 1st law o# thermodynamics is nothin but the law o# conser!ation o#
A.
momentum
B.
mass
C.
energy
D.
none o# these
A.
increases+ for an e3othermic reaction.
B.
decreases3 #or an exothermic reaction.
C.
increases3 #or an endothermic reaction.
D.
none o# these.
)$. '/. In a re!ersible chemical reaction 8where3 x number o# moles o# products&number o# moles o# reactants :
A.
addition o# inert as #a!ours the #orward reaction3 when x is is positi!e.
B.
pressure has no e##ect on e,uilibrium3 when n n 6.
C.
addition o# inert as has no e##ect on the e,uilibrium constant at constant !olume #or any !alue o# x 8% 8% !e3 & !e: or -ero:.
D.
all /a/+ /b/ /c/.
The expression3 chane
3 i!es the #ree enery
A.
with pressure changes at constant temperature.
B.
under re!ersible isothermal !olume chane.
C.
durin heatin o# an ideal as.
D.
durin coolin o# an ideal as.
)'. 2ll ases durin throttlin process at atmospheric temperature temperature and
C. pressure show a coolin e##ect except
#reon
D.
brine
)4. 7ater on heatin #rom 1 to )?C
A.
CO$
B.
!&
C.
O$
D.
N$
2.
contracts
G.
expands
C.
has same !olume
B.
may contract or expand
)). Compressibility #actor #or almost all the ases are approximately same at the same
A.
pressure and temperature.
B.
reduced pressure and reduced temperature.
C.
critical pressure and critical temperature.
D.
none o# these.
).
6. 9ick out the correct statement.
A.
Compression ratio o# an Otto enine is comparati!ely hiher than a diesel enine.
B.
2fficiency of an 4tto engine is higher than that of a diesel engine for the same compression ratio. Otto enine e##iciency decreases with the rise in compression ratio3 due to decrease in work produced per ,uantity o# heat. Biesel enine normally operates at lower compression ratio than an Otto enine #or an e,ual output o# work.
9ick out the wron statement.
A.
2cti!ity co&e##icient is dimensionless.
B.
In case o# an ideal as3 the #aacity is e,ual to its pressure.
C.
C.
In a mixture o# ideal ases3 the #uacity o# a component is e,ual to the partial pressure o# the component.
D.
D.
he fugacity co"efficient is zero for an ideal gas.
)/. The co&e##icient o# per#ormance 8CO9: o# a re#rieratin system3 which is its index o# per#ormance3 is de#ined as the ratio o# use#ul re#rieration to the net work. The units o# """""""""" and CO9 are the same.
A.
kinematic !iscosity
B.
work
C.
temperature
D.
none of these
)0. The chemical potential o# a component 8K i : o# a phase is the amount by which its capacity #or doin all work3 barrin work o# expansion is increased per unit amount o# sustance added #or an in#initesimal addition at constant temperature and pressure. It is i!en by
A.
B.
C.
D.
all (a+ (b and (c
). In Let re#rierators3 the re#rieratin #luid is practically always
A.
water
B.
ammonia
SECTION $
B none o# these . . 2t """""""""" point3 all the three phases 8i.e.solid3 li,uid and as: co& exist. 2.eutcetic B.triple C plait B.critical . 4. >opp@s rule is used to calculate the heat capacity o# A solids . G.li,uids C ases . B all 8a:3 8b: H 8c: .
Section ' 1. Trouton@s ratio o# """""""""" li,uids is calculated usin >istyakowsky e,uation. 2.polar B non"polar . C both 8a: H 8b: . B neither 8a: nor 8b: . $. 2cti!ity co&e##icient is a measure o# the A departure from ideal solution behaviour. . G.departure o# as phase #rom idea as law. C !apour pressure o# li,uid. . B none o# these. . '. 7hile dissol!in a as into a li,uid at a constant temperature3 the ratio o# the concentration o# the as in the solution phase and in the aseous phase is 2.in#inity G.unity C B constant neati!e . . ). 7hich o# the #ollowin units is not present in both the !apor compression re#rieration system and absorption re#rieration system ; 2.Expansion !al!e G.Condenser C e#rierator . D Compressor . . 5or an isothermal re!ersible compression o# an ideal as 2.only E 6 G.only H 6 C 5E 6 5H 6 # . B dQ dE . /. Meltin o# ice exempli#ies aan 2.adiabatic process. B endothermic reaction. . C exothermic reaction. . B process in!ol!in a chemical reaction. . 0. 2 re#rieration cycle is the same as a """""""""" cycle3 2.turbine G.heat enine C reversed heat engine .
16. """""""""" explains the e,uilibrium constant #or any chemical reaction. 2.(enry@s law B 7aw of mass action . C (ess@s law . B none o# these . 11. 7hich o# the #ollowin is not a re!ersible process ; 2.Expansion o# an ideal as aainst constant pressure. G. 2tmospheric pressure !aporisation o# water at 166?C. C 8olution of 9aCl in water at $#:C. . B None o# these. . 1$. 9ick out the wron statement. 2 closed system does not permit exchane o# mass with its 2. surroundins but may permit exchane o# enery. 2n open system permits exchane o# both mass and enery with its G. surroundins. The term microstate is used to characterise an indi!idual3 whereas C macro&state is used to desinate a roup o# micro&states with . common characteristics. D none of the above. . 1'. 7hich o# the #ollowin exempli#ies an adiabatic process ; 2.Meltin o# ice. G.Condensation o# alcohol !apor. C 8udden bursting of a cycle tube. . B E!aporation o# water. .
1). Entropy3 which is a measure o# the disorder o# a system is 2.independent o# pressure. G.independent o# temperature. C zero at absolute zero temperature for a perfect crystalline . substance. B all 8a:3 8b: H 8c: . 1. Critical temperature is de#ined as the temperature abo!e which a as will 2.not li,ui#y 8barrin exceptions:. G.immediately li,ui#y. C never li)uify however high the pressure may be. . B none o# these. . 1/. The standard Pibbs #ree enery chane o# a reaction depends on the e,uilibrium 2.pressure B temperature . C composition . B all 8a:3 8b: and 8c:
. 10. Pibbs&Buhem e,uation relates composition in li,uid phase and the """""""""" at constant temperature H pressure. 2.#uacity G.partial pressure C acti!ity co&e##icient . D (a+ (b+ and . 1. In an ideal solution3 the acti!ity o# a component e,uals its A mole fraction. . G.#uacity at the same temperature and pressure. C partial pressure. . B none o# these. . 14. 2 as has a !olume o# $0.' c.c. at 6?C. Its !olume at 16?C 8i# pressure remains unchaned: will be """""""""" c.c. 2.$.0' B.&;.% C $0' B.$' . $6. Clayperon e,uation deals with the A rate of change of vapour pressure with temperature. . G.e##ect o# an inert as on !apour pressure. C calculation o# ΔF #or spontaneous phase chane. . B temperature dependence o# heat o# phase transition. . $1. Pibbs #ree enery 8G: is represented by3 G H & TS3 whereas (elmholt- #ree enery3 8 A: is i!en by3 A E & TS. 7hich o# the #ollowin is the Pibbs&(elmholt- e,uation 2. G. C both (a and (b . B neither 8a: nor 8b: . $$. 7hich o# the #ollowin is an undesirable characteristics o# a re#rierant ; 2.It should be non&explosi!e. B
. G.neati!e C more than -ero . B indeterminate . $/. 9ick out the wron statement. 2.9hase rule !ariables are in tensi!e properties. B !eat and wor are both state function. . C The work done by expansion o# a as in !acuum is -ero. . B C P and C V are state #unction. . $0. Compressibility #actor o# a as is A not a function of its pressure. . G.not a #unction o# its nature. C not a #unction o# its temperature. . B unity3 i# it #ollows PV nRT . . $. 7hich o# the #ollowin is not an extensi!e property ; 2.5ree enery G.Entropy C =efractive inde3 . B None o# these . $4. 5orward reaction will be #a!oured #or the exothermic reaction3 represented by CO % ( $O CO$ % ($3 by A low temperature and high pressure. . G.low temperature and low pressure. C hih temperature and hih pressure. . B hih temperature and low pressure. . '6. Enthalpy o# a as depends upon its A G.mass temperature . C !olume B.pressure . '1. 7hen dilute a,ueous solutions o# two salts are mixed3 the process is associated with 2.decrease in temperature. B increase in temperature. . C no chane in temperature. . B chane in temperature which is a #unction o# composition. . '$. 9ick out the correct statement. +ike internal enery and enthalphy3 the absolute !alue o# standard 2. entropy #or elementary substances is -ero. Meltin o# ice in!ol!es increase in enthalpy and a decrease in G. randomness. C The internal enery o# an ideal as depends only on its pressure. . D a3imum wor is done u nder reversible conditions. . ''. Chemical enineerin thermodynamics is concerned with the """""""""" ino# chemical processes. 2.reaction mechanism G.calculation o# rates C energy transformation from one form to the another . B none o# these . '). 2n isolated system can exchane """""""""" with its surroundins. 2.matter
G.enery C neither matter nor energy . B both matter and enery . '. e,uisites o# a re!ersible process is that the 2.system and surroundins pressure be e,ual. B friction in the system should be absent. . C system and surroundins temperature be e,ual. . B none o# these. . '/. 5uacity is most help#ul in A representing actual behaviour of real gases. . G.representin actual beha!iour o# ideal ases. C the study o# chemical e,uilibria in!ol!in ases at atmospheric . pressure. B none o# these . '0. The enery o# acti!ation o# exothermic reaction is 2.-ero. G.neati!e. C !ery lare compared to that #or en&dothermic reaction. . D not possible to predict. . '. 9ick out the wron statement. The chemical potential o# a pure substance depends upon the 2. temperature and pressure. The chemical potential o# a component in a system is directly G. proportional to the escapin tendency o# that component. he chemical potential of ith species (?i in an ideal gas mi3ture C approaches zero as the pressure or mole fraction ( x i tends to . be zero at constant temperature. The chemical potential o# species @ i @ in the mixture 8Ki : is
B . mathematically represented as3 3 where3 n3 ni and n j respecti!ely denote the total number o# moles3 moles o# ith species and all mole numbers except ith species. @ G@ is Pibbs molar #ree enery. '4. In the reactionQ N $ % O$ $NO3 increasin the pressure will result in 2.shi#tin the e,uilibrium towards riht3 G.shi#tin the e,uilibrium towards le#t. C no change in e)uilibrium condition. . B none o# these. . )6. 2 cyclic enine exchanes heat with two reser!oirs maintained at 166 and '66?C respecti!ely. The maximum work 8in : that can be obtained #rom 1666 o# heat extracted #rom the hot reser!oir is A %@ G./1 . C //0 B.1666 . )1. 9ick out the wron statement. Trouton@s ratio o# non&polar li,uids i s calculated usin >istyakowasky 2. e,uation. G.Thermal e##iciency o# a Carnot enine is always less than 1. C An e)uation relating pressure+ volume and temperature of a gas . is called ideal gas e)uation. B none o# these. . )'. 7hen a as is subLected to adiabatic expansion3 it ets cooled due to 2.decrease in !elocity. G.decrease in temperature. C decrease in kinetic enery. .
D energy spent in doing wor. . )). oule&Thomson e##ect i .e.3 a throttlin process is a constant """""""""" process. 2.entropy G.temperature C internal enery . D enthalpy . ). In the e,uation3 PV n Constant3 i# the !alue o# n 63 then it represents a re!ersible """""""""" process. A G.isothermal isobaric . C isentropic B.isometric . )/. 7ork done in an adiabatic process between two states depends on the 2.rate o# heat transmission G.initial state only C end states only . B none o# these . )0. The number o# deree o# # reedom #or an a-eotropic mixture o# ethanol and water in !apour&li,uid e,uilibrium3 is 2.' B.1 C $ B.6 . ). The internal enery o# an ideal as is a #unction o# its """""""""" only. 2.molecular si-e G.!olume C pressure . D temperature . )4. 2t constant temperature and pressure3 #or one mole o# a pure substance3 the ratio o# the #ree enery to the chemical potential is 2.-ero B.one C in#inity B.neati!e . 6. The chane in """""""""" is e,ual to the re!ersible work #or compression in steady state #low process under isothermal condition. 2.internal enery G.enthalpy C ibbs free energy . B (elmholt- #ree enery . Section ) 1. 7ork done is a 2.property o# the system G.path #unction C point function . B state description o# a system . $. Entropy o# the system decreases3 when 2.snow melts into water. G.a as expands spontaneously #rom hih pressure to low pressure. C water is con!erted into ice. . D both (b (c. . '. Extensi!e properties o# a thermodynamic system depend upon the """""""""" o# the system. 2.speci#ic !olume G.temperature C mass . B pressure .
). The e,uation Tds dE & PdV applies to 2.sinle phase #luid o# !aryin composition. G.sinle phase #luid o# constant composition. C open as well as closed systems. . D both (b and (c . . I# an ideal solution is #ormed by mixin two pure li,uids in any proportion3 then the """""""""" o# mixin is -ero. 2.enthalpy G.!olume C both /a/ /b/ . B neither @a@ nor @b@ . /. Near their critical temperatures3 all ases occupy !olumes """""""""" that o# the ideal as. A less than . G.same as C more than . B hal# . 0. The #ree enery chane #or a chemical reaction is i!en by 8where3 K e,uilibrium constant: 2.RT lnK B "RT lnK . C &R lnK . B T lnK . . 5ree enery3 #uacity and acti!ity co&e##icient are all a##ected by chane in the temperature. The #uacity co&e##icient o# a as at constant pressure """"with the increase o# reduced temperature. 2.decreases B increases . C remains constant . B decreases loarithmically . 4. In the reaction3 ($ %I$ $(I3 addition o# an inert as will 2.increase the partial pressure o# ( $. G.increase the partial pressure o# I $. C increase the total pressure and hence shi#t the e,uilibrium towards the . riht. D not effect the e)uilibrium conditions . 16. 7hat is the number o# derees o# #reedom #or li,uid water in e,uilibrium with a mixture o# nitroen and water !apor ; A G.6 & . C ' B.1 . 11. The temperature at which a real as obeys the ideal as laws o!er a wide rane o# pressure is called the """""""""" temperature. 2.critical B.Boyle C in!ersion B.reduced . 1$. I# the molar heat capacities 8 C p or C v: o# the reactants and products o# a chemical reaction are identical3 then3 with the increase in temperature3 the heat o# reaction will 2.increase G.decrease C remain unaltered . B increase or decrease Q depends on the particular reaction .
1'. 2ll ases abo!e its in!ersion temperature3 in a throttlin process will show A a heating effect. . G.no chane in temperature. C a coolin e##ect. . B either 8a: or 8c:. . 1). 5irst law o# thermodynamics is mathematically stated as A dQ 6 dE dW . G.dQ dE & dW C dE dQ % dW . B dW dQ % dE . 1. 9ick out the wron statement. Sur#ace tension o# a substance !anishes at critical point3 as there is 2. no distinction between li,uid and !apour phases at its critical p oint. G.Entropy o# a system decreases with the e!olution o# heat. C Chane o# internal enery is neati!e #or exothermic reactions. . D he accentric factor for all materials is always more than one. . 1/. Translational kinetic enery o# molecules o# an ideal as is proportional to 8where3 T absolute temperature o# the as :
10. E,uation which relates pressure3 !olume and temperature o# a as is called the A e)uation of state . G.Pibbs Buhem e,uation C ideal as e,uation . B none o# these . 1. Claussius&Clayperon e,uation i!es accurate result3 when the !apour pressure is relati!ely low and the temperature does not !ary 2. o!er wide limits. !apour obeys the ideal as law and the latent heat o# !aporisation is G. constant. C !olume in the li,uid state i s neliible compared with that in the . !apour state. D all (a+ (b and (c. . 14. The temperature at which a real as obeys the ideal as laws o!er a wide rane o# pressure is called """""""""" temperature. A G.in!ersion Boyle . C critical B.reduced . $6. The expression #or entropy chane3 S n C p . ln 8T $T 1:3 is !alid #or the """""""""" o# a substance. 2.simultaneous pressure H temperature chane G.heatin C coolin . D both (b and (c . $1. 5or a sinle component two phase mixture3 the number o# independent !ariable properties are 2.two B.one C -ero B.three .
$$. """""""""" law o# thermodynamics ascertains the direction o# a particular spontaneous process. 2.Reroth G.5irst C 8econd B.Third .
. B enthalpy remains constant. .
$'. 2t normal boilin point3 m olar entropy o# !aporisation is """""""""" oule>?.mole. 2.0$ B.& C 1)$ B.14$ .
'$. 2 no--le is a de!ice3 which A increases inetic energy and decreases pressure. . G.reduces kinetic enery and increases pressure. C reduces both kinetic enery and pressure. . B increases both kinetic enery and pressure. .
$). 5or an ideal solution3 the !alue o# acti!ity co&e##icient is 2.6 B 1 . C <1 . B F1 .
''. Burinthe phase transition3 """""""""" chanes. 2.pressure B volume . C temperature . B all 8a:3 8b: and 8c: .
$. The expression3 nC v8 T $ & T 1:3 is #or the """""""""" o# an ideal as. A wor done under adiabatic condition . G.co&e##icient o# thermal expansion C compressibility . B none o# these .
'). The work done in an adiabatic chane in a particular as depends upon chanes in the """""""""" only. A temperature . G.speci#ic heat C !olume . B pressure .
$/. The number o# derees o# #reedom at the triple point o# water is A # G.1 . C $ B.' . $0. 7hich o# the #ollowin is a widely used re#rierant in !apour compression re#rieration system 8usin lare centri#ual compressor:; A reon . G.+i,uid sulphur dioxide C Methyl chloride . B 2mmonia . $. Internal enery is e,ual to the heat absorbed in case o# aan """""""""" process. A constant volume . G.polytropic C adiabatic . B constant pressure . $4. The #irst law o# thermodynamics is a restatement o# the law o# conser!ation o# 2.mass B energy . C momentum . B none o# these . '6. oule&Thomson co&e##icient #or a per#ect as is A zero . G.positi!e C neati!e . B none o# these . '1. In an adiabatic process3 the A heat transfer is zero. . G.temperature chane is -ero. C work done is a path #unction.
'. The !alue o# as constant @@ is 2.1.40 calm mole ?> G.1.40 GTlb. mole ? C both (a and (b . B neither 8a: nor 8b: . '/. In an isothermal process on an ideal as3 the pressure increases by 6. percent. The !olume decreases by about """""""""" percent. 2.6.$ B.#.$ C 6.0 B.1 . '0. 7hich o# the #ollowin is not a unit o# the e,uilibrium constant K p; 8where3 x number o# moles o# products number o# moles o# reactants: 2.8atm: x 3 when x is neati!e G.8atm: x 3 when x is positi!e C Bimensionless3 when x 6 . D (atm5 x &+ when 5 x > # . '. 9ick out the correct statement. The a!ailable enery in an isolated system #or all irre!ersible 8real: 2. processes decreases. The e##iciency o# a Carnot enine increases3 i# the sink temperature is G. decreased. C The re!ersible work #or compression in non&#low process under . isothermal condition is the chane in (elmholt- #ree enery. D all (a+ (b and (c . '4. 9artial molal ,uantities are important in the study o# 2.ideal ases G.ideal solutions C non"ideal mi3tures . B a pure component . )6. Number o# derees o# #reedom #or a three phase system in e,uilibrium comprisin o# three non&reactin chemical species is A G.6 & . C 1 B.' .
)1. Critical solution temperature 8or the con&solute temperature: #or partially miscible li,uids 8e..3 phenol&water: is the minimum temperature at which A a homogeneous solution (say of phenol water is formed. . G.mutual solubility o# the two l i,uids shows a decreasin trend. C two li,uids are completely separated into two layers. . B none o# these. . )$.
7hich is not constant #or an ideal as ;
G.by throttlin. C by e3pansion in an engine. . B none o# these. . SECTION 1. The heat capacities #or the ideal as state depend upon the 2.pressure B temperature . C both 8a: H 8b: . B neither 8a: nor 8b: . $. 7hich o# the #ollowin will increase the !olume o# a real as by #our times ; 2.Boublin the absolute temperature as well as pressure o# the as. B =educing pressure to one fourth at constant temperature. . C educin temperature to one #ourth at constant pressure. . B educin the temperature to hal# and doublin the pressure. .
)'. Enthalpy @H @ is de#ined as 2.H E & PV G.H F & TS C H " E 6 PV . B none o# these . )). One ton o# re#rieration is de#ined as the heat rate correspondin to meltin o# one ton o# ice in one 2.hour B.day C minute B.second .
). """""""""" #unctions are exempli#ied by heat and work. A ,ath . G.9oint C State . B none o# these . )/. In an irre!ersible process 2.Tds dE & dW 6 G.dE & dW & Tds 6 C Tds " dE dW * # . B Tds & dT % dW < 6 . )0. 7hat is the number o# deree o# #reedom #or a system o# two m iscible non&reactin species in !apor&li,uid e,uilibrium #ormin an a-eotrope ; 2.' G.$ C 1 B.6 . ). The entropy chane in a re!ersible isothermal process3 when an ideal as expands to #our times its initial !olume is A R loge @ . G.R lo16 ) C C v lo16 ) . B C v loe ) . )4. PV Constant 8where3 C pC v: is !alid #or aan """""""""" process. 2.isothermal G.isentropic C isobaric D.adiabatic . 6. Claude as li,ue#action process employs coolin 2.at constant pressure.
'. 9ick out the wron statement. A A refriferation cycle violates the second law of thermadynamics. . e#rieration cycle is normally represented by a temperature !s. G. entropy plot. C In a re#rierator3 work re,uired decreases as the temperature o# the . re#rierator and the temperature at which heat is reLected increases. B One ton o# re#rieration is e,ui!alent to the rate o# heat absorption . e,ual to '.' k7. ). The e,uation3 PV nRT 3 is best obeyed by ases at A low pressure high temperature. . G.hih pressure H low temperature. C low pressure H low temperature. . B none o# these. . . Internal enery o# an element at 1 atm and $? C is """""""""" kcalk.mole. A # . G.$0' C $ . B none o# these . /. 7hich o# the #ollowin li,uid metals has the hihest thermal conducti!ity ; A olten sodium . G.Molten lead C Mercury . B Molten potassium . 0. 7hich o# the #ollowin has the least thermal e##iciency ; A 8team engine . G.Carnot enine C Biesel enine . B Otto enine . . I# the internal enery o# an ideal as decreases by the same amount as the work done by the system3 then th e 2.process must be isobaric. G.temperature must decrease. C process must be adiabatic. . D both (b and (c.
. 4. oule&Thomson Co&e##icient at any point on the in!ersion cur!e is 2.U G.% !e C # . B &!e .
. B in#inity . 10. The ratio o# e,uilibrium constants 8 Kp$Kp1: at two di##erent temperatures is i!en by 2.
16. 9ick out the wron statement. B . 2. The !alues o# are -ero #or a real as at its critical point. (eat trans#erred is e,ual to the chane in the enthalpy o# the system3 G. #or a constant pressure3 n on&#low3 mechanically re!ersible process. hermal efficiency of a Carnot engine depends upon the C properties of the woring fluid besides the source sin . temperatures. B Burin a re!ersible adiabatic process3 the entropy o# a substance . remains constant. 11. Number o# components 8C :3 phase 8P : and derees o# #reedom 8F : are related by Pibbs phase rule as A P F " C 6 & . G.C P & F % $ C F C & P & $ . B P F & C & $ . 1$. The !alue o# C p H C v respecti!ely #or monoatomic ases in >calk Mole . ?> are A $% . G.'.40 H 1.40 C 1.40 H 6.// . B 6.// H 1.40 . 1'.
is the mathematical expression #or 2.speci#ic heat at constant pressure 8C p:. G.speci#ic heat at constant !olume 8C v: . C Eoule"hompson co"efficient. . B none o# these. . 1). In case o# a close thermodynamic system3 there is """""""""" across the boundaries. 2.no heat and mass trans#er B no mass transfer but heat transfer . C mass and enery trans#er . B none o# these . 1. Burin a re!ersible isothermal expansion o# an ideal as3 the entropy chane is A ve G.6 . C &!e B.U . 1/. 2s the temperature is lowered towards the absolute -ero3 t he !alue o#
3 then approaches 2.unity B zero . C that o# the heat o# reaction
C .
B .
1. 7hich o# the #ollowin is not a##ected by temperature chanes ; 2.5uacity G. 2cti!ity co&e##icient C 5ree enery . D 9one of these . 14. 5or an ideal as3 the acti!ity co&e##icient is 2.directly proportional to pressure. G.in!ersely proportional to pressure. C unity at all pressures. . B none o# these. . $6. Those solutions in which there is no !olume chane upon mixin the components in the li,uid state and which3 when diluted do not undero any heat chane 8i.e. heat o# d ilution is -ero:3 are called """""""""" solutions. A ideal . G.real C isotonic . B none o# these . $1. Peneration o# heat by #riction is an example o# aan """""""""" chane. 2.isothermal B.irreversible C adiabatic B.re!ersible . $$. 2 domestic re#rierator has aan """""""""" cooled condenser. 2.water B.air C e!aporati!e B.as . $'. The extensi!e properties are 2.!olume3 mass and number o# moles. G.#ree enery3 entropy and enthalpy. C both (a and (b. . B none o# these. . $). The compressibility #actor o# a as is i!en by 8where3 V 1 actual !olume o# the as V $ as !olume predicted by ideal as law : A V 1 FV & G.V $V 1 . C B.V 1.V $ V &V . 1 $ $. I# we increase the pressure on a substance 8which is at its triple point:3 then the triple point 2.increases G.decreases
C remains unchanged . B may increase or decrease Q depends on the substance .
$/. In an ideal re#rieration cycle3 the chane in internal enery o# the #luid is 2.%!e G.&!e C # . B either o# the abo!e three Q depends on the nature o# re#rierant. . $0. 5ree enery 2.decreases in all spontaneous 8or irre!ersible: processes. G.chane durin a spontaneous process has a neati!e !alue. C remains unchaned in re!ersible processes carried at constant . temperature and pressure. D all (a+ (b and (c. . $. AI# di##erent processes are used to brin about the same chemical reaction3 the enthalpy chane is same #or all o# themA. This is """""""""" law. A !ess/s . G.>ircho##@s C +a!oisier and +aplace . B none o# these . $4. 5uacity is a measure o# the A escaping tendencies of the same substance in different phases . of a system. G.relati!e !olatility o# a mixture o# two miscible li,uids. C beha!iour o# ideal ases. . B none o# these. . '6. The ,uantitati!e e##ect o# temperature on chemical e,uilibrium is i!en by the A -ant"!off e)uation. . G.+e&Chatelier@s principle. C 2rhenius e,uation. . B none o# these. . '1. 5or an irre!ersible process in!ol!in only pressure&!olume work A (dF T + p *# . G.8dF :T 3 p 6 C 8dF :T 3 p F 6 . B 8dA:T 3 v F6 . '$. Ideal re#rieration cycle is 2.same as Carnot cycle. B same as reverse Carnot cycle. . C dependent on the re#rierant@s properties. . B the least e##icient o# all re#rieration processes. . ''. The #ollowin heat enine produces power o# 166666 k7. The heat enine operates between 66 > and '66 >. I t has a thermal e##iciency e,ual to 6= o# that o# the Carnot enine #or the same temperature. The rate at which heat is absorbed #rom the hot reser!oir is 2.1663 666 k7 G.1/63 666 k7 C $663 666 k7 . D %&#+ ### G .
'). e#rieration cycle 2.!iolates second law o# thermodynamics. B involves transfer of heat from low temperature to high . temperature. C both 8a: and 8b:. . B neither 8a: nor 8b:. . '. The enthalpy chane when ammonia as is dissol!ed in water is called the heat o# A G.#ormation solution . C dilution B.combustion . '/. The !alue o# oule&Thomson co&e##icient3 in case where coolin occurs a#ter the throttlin process is 2.6 G.U C B.&!e ve . '0. 2diabatic compression o# a saturated water !apour makes it 2.supersaturated B superheated . C both 8a: and 8b: . B neither 8a: nor 8b: . '. The speci#ic heat o# saturated water !apour at 166?C is 2.U B."ve C 6 B.%!e . '4. 5or a multicomponent system3 the term chemical potential is e,ui!alent to the 2.molal concentration di##erence. G.molar #ree enery. C partial molar free energy. . B molar #ree enery chane. . )6. The chane in Pibbs #reee enery #or !aporisation o# a pure substance is 2.positi!e G.neati!e C zero . B may be positi!e or neati!e . )1. Critical compressibility #actor #or all substances A are more or less constant (vary from #.& to #.%. . G.!ary as s,uare o# the absolute temperature. C !ary as s,uare o# the absolute pressure. . B none o# these. . )$. 7hat is the deree o# #reedom #or two mis&cible 8non&reactin: substances in !apor&li,uid e,uilibrium #ormin an a-eotrope ; 2.6 G.1 C B.' & . )'. 5or a i!en substance at a speci#ied temperature3 a cti!ity is """""""""" to #uacity. A directly proportional . G.in!ersely proportional C e,ual . B none o# these . )). In case o# !apour compression re#rieration system3 ele!atin the
e!aporator temperature 8keepin the condenser temperature constant: results in A enhanced C4,. . G.decreased CO9. C no chane in the !alue o# CO9. . B increased or decreased CO9 Q dependin upon the type o# . re#rierant. ). 5or water at '66?C3 it has a !apour pressure 4$.0 k9a and #uacity /0'.4 k9a nder these conditions3 one mole o# water i n li,uid phase has a !olume o# $.$ cm ' and that in !apour phase in '41.1 cm'.5uacity o# water 8in k9a: at 4666 k9a will be 2./0'.4 B.H'$%.$ C 06.' B.4666 . )/. """""""""" e,uation predicts the acti!ity co&e##icient #rom experimental data. 2.+ewis&andall G.Marules C *an +aar . D both(b(c . )0. 2s the temperature is lowered towards the absolute -ero3 t he !alue o#
the ,uantity A zero . G.unity C in#inity . B none o# these .
approaches
). 2n ideal li,uid re#rierant should not ha!e a subatmospheric !apour pressure at the temperature in the 2. re#rierator coils. G.not ha!e unduly hih !apour pressure at the condenser temperature. C both (a and (b. . B ha!e low speci#ic heat. . )4. I# the heat o# solution o# an ideal as in a li,uid is neati!e3 then its solubility at a i!en partial pressure !aries with the temperature as 2.solubility increases as temperature increases. B solubility increases as temperature decreases. . C solubility is independent o# temperature. . B solubility increases or decreases with temperature dependin on the . Pibbs #ree enery chane o# solution. 6. In case o# a re!ersible process 8#ollowin pv n constant:3 work obtained #or treblin the !olume 8 v 1 1 m' and v $ ' m' : is max imum3 when the !alue o# @n@ is A # . G.1 C y 1.)) . B 1.// . 82C<49 H 1. The Carnot co&e##icient o# per#ormance 8CO9: o# a domestic air conditioner compared to a household re#rierator is A less . G.more C same . B dependent on climatic conditions .
$. The unit o# #uacity is the same as that o# the A pressure . G.temperature C !olume . B molar concentration . '. 5illin o# as #rom a hih pressure cylinder into small bottles is an example o# aan """""""""" process. 2.e,uilibrium G.adiabatic C steady D.unsteady . ). 2 lare iceber melts at the base3 but not at the top3 because o# the reason that 2.ice at the base contains impurities which lowers its meltin point. B due to the high pressure at the base+ its melting point reduces. . C the iceber remains in a warmer condition at the base. . B all 8a:3 8b: and 8c:. . . 2t the critical point o# a substance 2.the sur#ace tension !anishes. G.li,uid and !apour ha!e the same density. C there is no distinction between li,uid and !apour phases. . D all (a+ (b and (c. . /. 2 system underoes a chane #rom a i!en initial state to a i!en #inal state either by an irre!ersible process or by a re!ersible process3 then8where3 S1 and SR are the entropy chanes o# the system #or the irre!ersible and re!ersible processes respecti!ely: 2. S1 is always < SR G. S1 is sometimes F SR C 5 S 1 is always > 5 S R . B S1 is always SR . 0. 7hat is the !alue o# oule&Thomson co&e##icient #or an ideal as ; 2.%!e G.&!e C # B.U . . 2 two stae compressor is used to compress an ideal as. The as is cooled to the initial temperature a#ter each stae. The intermediate pressure #or the minimum total work re,uirement should be e,ual to the """""""""" mean o# P 1 and P $.8where3 P 1 and P $ are initial and #inal pressures respecti!ely: 2.loarithmic G.arithmetic C B.harmonic geometric . 4. y speci#ic heat ratio o# an ideal as is e,ual to 2.C pC v G.C p8C P &R : C 1 % 8R C V: . D all (a+ (b and (c . 16. Consider the process A H B shown in the #iure i!en below
upper consolute temperature. Systems3 in which the mutual solubility increases with decrease in G. temperature3 are said to possess lower consolute temperature. Nicotine&water system shows both an upper as well as a lower C consolute temperature3 implyin that they are partially miscible . between these two limitin temperatures. D none of these .
In this case3 it is possilbe that 2.both the processes are adiabatic. G.both the processes are isothermal. C process A is isothermal while B is adiabatic. . B process A is adiabatic while B is isothermal. . 11. Pibbs #ree enery o# a pure #luid approaches """""""""" as the pressure tends to -ero at constant temperature. 2.in#inity B minus infinity . C -ero . B none o# these . 1$. 2s the entropy o# the uni!erse is increasin3 day by day3 the work producin capacity o# a heat enine is 2.not chaned B decreasing . C increasin . B data su##icient3 can@t be predicted . 1'. 2n irre!ersible process 2.is the analo o# linear #rictionless motion in machines. G.is an idealised !isualisation o# beha!iour o# a system. C yields the maximum amount o# work. . D yields an amount of wor less than that of a reversible process. . 1). The expression #or the work done #or a re!ersible polytropic process can be used to obtain the expression #or work done #or all processes3 except re!ersible """""""""" process. 2.isobaric B isothermal . C adiabatic . B none o# these . 1. oule&Thomson co&e##icient depends on the 2.pressure. G.temperature. C both (a (b. . B neither 8a: nor 8b:. . 1/. 5ree enery chane o# mixin two li,uid substances is a #unction o# the 2.concentration o# the constituents only. G.,uantities o# the constituents only. C temperature only. . D all (a+ (b and (c. . 10. 9ick out the wron statement. 2.System 8o# partially miscible li,uid pairs:3 in which the mutual solubility increases with rise in temperature3 are said to possess an
1. The total chane in the enthalpy o# a system is independent o# the A number of intermediate chemical reactions involved. . G.pressure and temperature. C state o# combination and areation in the beinnin and at the end . o# the reaction. B none o# these. . 14. Number o# phases in a colloidal system are 2.1 B.& C ' B.) . $6. 5ree enery chanes #or two reaction mechanism @ X @ and @ are respecti!ely & 1 and & units. It implies that X is 2.slower than B faster than Y . C three times slower than . B three times #aster than . $1. *apour which is at a pressure smaller than the saturation pressure #or the temperature in!ol!ed is called a """""""""" !apour. A superheated . G.desuperheated C non&condensable . B none o# these . $$. 2t e,uilibrium condition3 the chemical potential o# a material in di##erent phases in contact with each other is e,ual. The chemical potential # or a real as 8K: is i!en by8where3 K standard chemical potential at unit #uacity 8! ? 1 atm.: and the as beha!es ideally.: A ?: RT ln f . G.K?% R ln! C K? % T ln! . B K? % R T ln! . $'. The kinetic enery o# as molecule is -ero at 2.6?C G.$0'?C C 166?C D."&'%:C . $). 7hich o# the #ollowin is not an intensi!e property ; A G.Bensity -olume . C Temperature B.9ressure . $. The necessary and su##icient condition #or e,uilibrium between two phases is the concentration o# each component should be same in the two 2. phases. G.the temperature o# each phase should be same. C the pressure should be same in the two phases. . D the chemical potential of each component should be same in the . two phases. $/. Speci#ic !olume o# an ideal as is 2.e,ual to its density. B the reciprocal of its density. . C proportional to pressure.
. B none o# these. .
2.Gucket G.Throttlin C Separatin . D A combination of separating throttling .
$0. 9ick out the extensi!e property out o# the #ollowin. 2.Sur#ace tension B ree energy . C Speci#ic heat . B e#racti!e index . $. Entropy chane o# the reaction3 ( $O8li,uid:
termed as the enthalpy o# 2.solution C #ormation .
($O8as:3 is
B.vaporisation B.#ormation
$4. 7hich law o# the thermodynamics pro!ids basis #or measurin the thermodynamic property ; 2.5irst law B Ieroth law . C Third law . B Second law . '6. Pibbs #ree enery per mole #or a pure substance is e,ual to the 2.latent heat o# !aporisation B chemical potential . C molal boilin point . B heat capacity . '1. Pibbs #ree enery at constant pressure and temperature under e,uilibrium conditions is 2.U G.6 C maximum D.minimum . '$. 7ith increase in pressure 8abo!e atmospheric pressure:3 the C p o# a as A increases . G.decreases C remains unchaned . B #irst decreases and then increases . ''. 2 chane in state in!ol!in a decrease in entropy can be spontaneous3 only i# A it is e3othermic. . G.it is isenthalpic. C it takes place isothermally. . B it takes place at constant !olume. . '). oule&Thomson co&e##icient which is de#ined as3
3 chanes sin at a temperature known as in!ersion temperature. The !alue o# oule&Thomson co&e##icient at in!ersion temperature is A G.U # . C %!e B.&!e . '. """""""""" calorimeter is normally used #or measurin the dryness #raction o# steam3 when it is !ery low.
'/. The amount o# heat re,uired to decompose a compound into its elements is """""""""" the heat o# #ormation o# that compound #rom its elements. 2.less than G.more than C same as . B not related to . '0. 5or a constant !olume process 2.dE C vd T B dE 6 C v dT . C dQ dE % pdV . B dW pdV . '. In case o# the decomposition o# hydroiodic acid 8$(I
($ %
I$:3 addition o# ($ 8at e,uilibrium condition: will 2.increase the partial pressure o# I $. G.decrease the partial pressure o# (I. C diminish the degree of dissociation of !<. . B none o# these. . '4. In any spontaneous process3 the """""""""" #ree enery decreases. 2.(elmholtG.Pibbs C both a b . B neither @a@ nor @b@ . )6. The as law 8PV RT : is true #or an """""""""" chane. 2.isothermal G.adiabatic C both (a (b . B neither 8a: nor 8b: . )1. The e,uation "# Tds & PdV is applicable to in#initesimal chanes occurin in 2.an open system o# constant composition. G.a closed system o# constant composition. C an open system with chanes in composition. . D a closed system with changes in composition. . )$. (eat is added at constant temperature in an ideal """""""""" cycle. A 8tirling . G.Grayton C ankine . B none o# these . )'. 9ick out the correct e,uation relatin @ F @ and @A@. A F 6 A PV . G.F E % A C F A & TS . B F A % TS . )). In a re!ersible process
A Tds 6 dE dW . G.dE & dW Tds C dW & dE Tds . B Tds & dW % dE F6 . ). C v #or an ideal as 2.does not depend upon temperature. G.is independent o# pressure only. C is independent o# !olume only. . D is independent of both pressure and volume. . )/. The e,uation3 C p & C v R 3 is true #or """""""""" as. 2.no G.any real C only ideal . B both 8b: and 8c: .
'.
)0. In a homoeneous solution3 the acti!ity co&e##icient o# a component depends upon the 2.pressure G.composition C temperature . D all (a+ (b and (c . ). 9ick out the wron statementJ 2.The expansion o# a as in !acuum is an irre!ersible process. B An isometric process is a constant pressure process. . C Entropy chane #or a re!ersible adiabatic process is -ero. . B 5ree enery chane #or a spontaneous process is neati!e. . )4. 7ith increase in compression ratio3 the e##iciency o# the otto enine A increases . G.decreases C remains constant . B increases linearly .
).
.
6. The chemical potential o# any constituent o# an ideal solution depends on the """""""""" o# the solution. 2.temperature G.pressure C composition . D all (a+ (b and (c .
2.
in standard state
G.
at hih pressure
C.
at low temperature
B.
in ideal state
e#rierants commonly used #or domestic re#rierators are 2.
ethyl chloride or methyle chloride
B.
freon"1&
C.
propane
B.
N(' or CO$.
Solid and li,uid phases o# a substance are in e,uilibrium at the A.
critical temperature
G.
meltin point.
C.
#ree-in point.
B.
both 8b: and 8c:.
2bsolute -ero temperature sini#ies the 2.
minimum temperature attainable.
G.
temperature o# the heat reser!oir to which a Carnot enine reLects all the heat that is taken in.
C.
temperature of the heat reservoir to which a Carnot engine reJects no heat.
B.
none o# these.
SECTION 0 1.
$.
Third law o# thermodynamics is help#ul in A.
prediction of the e3tent of a chemical reaction.
G.
calculatin absolute entropies o# substances at di##erent temperature.
C.
e!aluatin entropy chanes o# chemical reaction.
B.
both 8b: and 8c:
5uacity and pressure are numerically e,ual3 when the as is
/.
Speci#ic """""""""" does not chane durin a phase chane 8e.. sublimation3 meltin3 !aporisation etc.:. 2.
entropy
G.
internal enery
C.
enthalpy
B.
Pibbs #ree enery
0.
(eat o# #ormation o# an element in its standard state is 2.
6
G.
<6
C.
F6
B.
1$.
The e,uation relatin E3 93 * and T which is true #or all substanes
under all conditions is i!en by e,uation is called the
1).
Maxwell@s e,uation.
G.
thermodynamic e,uation o# state.
B.
B.
decreases
C.
remains unchaned
D.
data insu##icient3 can@t be predicted
In the e,uation3 PV n constant3 i# the !alue o# n 13 then it represents a re!ersible """""""""" process.
A.
isothermal
B.
isobaric
C.
polytropic
D.
adiabatic
5or the aseous phase chemical reaction3 C $()8: % ($O8: C$(O(8:3 the e,uilibrium con!ersion does not depend on the
A.
steam to ethylene ratio.
B.
temperature.
C.
pressure.
D.
none o# these.
e,uation o# state.
edlich&>won e,uation o# state.
1. 4.
increases
.This
2.
C.
A.
a #unction o# pressure 1'.
.
5or an isothermal process3 the internal enery o# a as
The #irst law o# thermodynamics is a statement o# conser!ation o#
5or an exothremic reaction 2.
only enthalpy chane 8(: is neati!e.
G.
only internal enery chane 8E: is neati!e.
C.
both ( and E are neati!e.
B.
enthalpy chane is -ero.
1/.
A.
heat
B.
momentum
C.
enery
D.
work
ABry iceA is
A.
moisture #ree ice
B.
solid helium
C.
solid carbon dio3ide
D.
none o# these
16. 9ick out the wron statement. 10. 2.
2n ideal li,uid or solid solution is de#ined as one in which each component obeys aoult@s law.
G.
I# aoult@s law is applied to one component o# a binary mixture Q (enry@s law or aoult@s law is applied to the other component also.
C.
(enry@s law is riorously correct in the limit o# in#inite dilution.
B.
none o# these.
11. The shape o# T&S diaram #or Carnot Cycle is a
A.
rectangle
B.
rhombus
C.
trape-oid
D.
circle
C v is i!en by
A.
B.
C.
mixture o# composition R3 at a temperature T and pressure 93 is a #unction only o# D.
1. 7hich o# the #ollowin non&#low re!ersible compression processes re,uire maximum work ;
A.
Adiabatic process
B.
Isothermal process $).
C.
Isobaric process
D.
2ll re,uire same work
14. 9ick out the correct statement.
A.
2n ideal as on expansion in !acuum ets cooled.
C.
2n ideal as on expansion in !acuum ets heated up.
D.
2 real as on expansion in !acuum cools down whereas ideal as remains una##ected.
B.
and ,
C.
T3 9 and R
D.
T and R
7ith increase in reduced temperature3 the #uacity co&e##icient o# a as at constant reduced pressure
A.
increases
B.
decreases
C.
remains same
D.
decreases linearly
$. 5or an ideal as3 the enthalpy
$6. A7hen a system in e,uilibrium is subLected to a chane in temperature3 pressure or concentration3 the e,uilibrium is displaced in a direction which tends to undo the e##ect o# the chane.A This is called the
A.
+e&Chatelier principle.
B.
>opp@s rule.
C.
law o# correspondin state.
A.
increases with rise in pressure.
B.
decreases with rise in pressure.
C.
is independent of pressure.
D.
is a path #unction.
$/. E##iciency o# a heat enine workin on Carnot cycle between two temperature le!els depends upon the
A.
two temperatures only.
B.
pressure o# workin #luid.
C.
mass o# the workin #luid.
D.
mass and pressure both o# the workin #luid.
2rrehenius hypothesis.
$1. Sound wa!es propaation in air exempli#ies an """""""""" process.
A.
adiabatic
B.
isothermal
C.
isometric
D.
none o# these
$0.
$$. 5or e,uilibrium process 8i .e. re!ersible: in an isolated system
A.
T
2 real as on expansion in !acuum ets heated up.
B.
D.
A.
In oule&Thomson porous plu experiment3 the
A.
enthalpy does not remain constant.
B.
entire apparatus is exposed to surroundins.
C.
temperature remains constant.
D.
none of these.
ds 6 #
B.
ds < 6
C.
ds F 6
D.
ds Constant
$'. The partial molar enthalpy o# a component in an ideal binary as
$. The root mean s,uare speed o# molecules o# a as is e,ual to 8where3 $ mass o# the molecule K Golt-man@s constant3 T absolute temperature:
A.
B.
distillation
B. ').
9ick out the correct statement.
A.
Entropy and enthalpy are path #unctions.
B.
In a closed system3 the enery can be exchaned with the surroundin3 while. matter can not be exchaned.
C.
All the natural processes are reversible in nature.
D.
7ork is a state #unction.
C.
D.
$4. The intensi!e properties are
'.
2ir&re#rieration cycle
A.
molar !olume3 density3 !iscosity and boilin point.
A.
is the most e##icient o# all re#rieration cycles.
B.
re#racti!e index and sur#ace tension.
B.
has !ery low e##iciency.
C.
both (a and (b.
C.
re,uires relati!ely lare ,uantities o# air to achie!e a sini#icant amount o# re#rieration.
D.
none o# these. D.
both (b and (c.
'6. 2 Carnot cycle consists o# the #ollowin steps J
A.
wo isothermals and two isentropics.
B.
Two isobarics and two isothermals.
C.
Two isochorics and two isobarics.
D.
Two isothermals and two isochorics.
'/.
'1. 5or a cyclic process3 a #ixed ratio between heat and work
A.
always e3ists
B.
may exist
C.
ne!er exists
D.
is di##icult to predict
'0.
'$. 7hich o# the #ollowin is not a common re#rierant ;
A.
5reon&1$
B.
2thylene
C.
2mmonia
D.
Carbon dioxide
'.
''. The most important application o# distribution law is in
2.
e!aporation
B.
li)uid e3traction
C.
dryin
'4.
In !apour compression re#rieration system3 i# the e!aporator temperature and the condenser temperatures are &1'?C and '0?C respeti!ely3 the Carnot CO9 will be
A.
$.&
B.
/.$
C.
6.1/
D.
data insu##icient3 can@t be #ound out
Pibbs #ree enery o# mixin at constant pressure and temperature is always
A.
6
B.
U
C.
% !e
D.
" ve
The compressibility #actor #or an ideal as is 1. Its !alue #or any other real as is
A.
1
B.
<1
C.
F1
D.
either (b or (c+ depends on the nature of the gas
I# two ases ha!e same reduced temperature and reduced pressure3 then they will ha!e the same
A.
!olume
B.
mass
C.
critical temperature
D.
none of these
). E##iciency o# a Carnot enine workin between temperatures T 1 and T $ 8T 1 < T : is
A.
)6. 7hich o# the #ollowin is an extensi!e property o# a system ; B. A.
!eat capacity
B.
Molal heat capacity
C.
9ressure
D.
Concentration
C.
)1. The reaction A 8% :
R 8& : is allowed to reach e,uilibrium
conditions in an autocla!e. 2t e,uilibrium3 there are two phases3 one a pure li,uid phase o# A and the other a !apor phase o# A3 R and S. Initially A alone is present. The number o# derees o# #reedom are
D.
)/. Meltin o# wax is accompanied with """""""""" in entropy. 2.
increase
A.
1
B.
&
G.
decrease
C.
'
D.
6
C.
no chane
B.
none o# these
)$. C p & C v R is !alid #or """""""""" ases.
A.
ideal
B.
all
C.
!ery hih pressure
D.
!ery low temperature
)0.
2 thermodynamic system is taken #rom state A to B alon ACB and is brouht back to A alon B"A as shown below in the P &V diaram.
)'. 2t a i!en temperature3 the !olume o# a as dissol!ed in a sol!ent """""""""" with increase in pressure.
A.
increases
B.
decreases
C.
remains unchanged
The net work done durin the complete cycle is i!en by the area co!ered by
A. D.
P ' ACBP ( P'
may increase or decreaseQ depends on the as
)). 7hich is an example o# closed system ;
A.
2ir compressor
B.
7)uid cooling system of an automobile
C.
Goiler
D.
None o# these
).
ACBB' A' A
B.
C.
ACBDA
D.
A"BB' A' A
7ork done in case o# #ree expansion is
A.
indeterminate
B.
zero
C.
neati!e
D.
none o# these
)4. Chemical potential 8an intensi!e property: o# a substance is a #orce that dri!es the chemical system to e,uilibrium and is e,ual to its partial molar properties. The reatio o# chemical potential to #ree enery o# a pure substance at oconstant temperature and pressure is
A.
6
B.
1
C.
U
D.
none o# these
.
6. Burin adiabatic expansion o# as
A.
pressure remains constant.
B.
pressure is increased.
C.
temperature remains constant.
D.
none of these.
/.
A.
Minimum number o# deree o# # reedom o# a system is -ero.
B.
Beree o# #reedom o# a system containin a aseous mixture o# helium3 carbon dioxide and hydroen is ).
C.
5or a two phase system in e,uilibrium made up o# #our non&reactin chemical species3 the number o# derees o# #reedom is ).
D.
2nthalpy and internal energy change is zero during phase change processes lie melting+ vaporisation and sublimation.
Tea kept in a thermos #lask is !iorously shaken. I# the tea is considered as a system3 then its temperature will
A.
increase
B.
decrease
C.
remain unchaned
D.
#irst #all and then rise.
Chane o# heat content when one mole o# compound is burnt in oxyen at constant pressure is called the
SECTION J A.
calori#ic !alue
B.
heat o# reaction
C.
heat of combustion
D.
heat o# #ormation
1. 5or the re!ersible exothermic reaction3 N $ % '($ increase o# pressure would
$.
'.
).
A.
shi#t the e,uilibrium towards riht.
B.
i!e hiher yield o# N( '.
C.
both (b and (c.
D.
neither 8a: nor 8b:.
$N('3
0.
7hich o# the #ollowin has the minimum !alue o# CO9 #or a i!en re#rieration e##ect;
A.
e!erse Carnot cycle.
B.
Ordinary !apour&compression cycle.
C.
*apour&compression process with a re!ersible expansion enine.
D.
Air refrigeration cycle.
.
Clausius & Clayperon e,uation is applicable to """""""""" e,uilibrium processes.
A.
solid&!apor
B.
solid&li,uid
C.
li,uid&!apor
D.
all (a+ (b and (c
In which o# the #ollowin reaction e,uilibria3 the !alue o# e,uilibrium constant K p will be more than is K ) ;
A.
"""""""""" decreases durin adiabatic throttlin o# a per#ect as.
A.
Entropy
B.
Temperature
C.
Enthalpy
D.
,ressure
B.
C. D.
$(I
N$O)
($ % I$
$NO$
$SO$ % O$
$SO'
none o# these
9ick out the wron statement. 4.
2#ter throttlin3 as temperature
re#rieration cycle.
16.
A.
decreases
B.
increases
C.
remains same
D.
may increase or decrease Q depends on the nature o# the as
A.
Carnot
B.
air
C.
absorption
D.
!apour&eLection
The chemical potential #or a pure substance is """""""""" its partial molal #ree enery.
A.
more than
B.
less than
C.
e)ual to
1/.
11. 7hen li,uid and !apour phase o# multi& component system are in e,uilibrium 8at a i!en temperature and pressure:3 then chemical potential o# each component is
A.
same in both the phases.
B.
-ero in both the phases.
C.
more in !apour phase.
D.
more in li,uid phase.
10.
1).
states that n1d ?1 n&d ?& ....n j d? j 6 #+ for a system of definite composition at constant temperature and pressure.
B.
applies only to binary systems.
C.
#inds no application in as&li,uid e,uilibria in!ol!ed in distillation.
D.
none o# these
Minimum number o# phases that exists in a system is 1. Number o# chemical species in a colloidal system is
A.
1
B.
)
C.
&
D.
'
CO9 o# a re#rierator drawin 1 k7 o# power per ton o# re#rieration is about 1.
1'.
A. not related to
D.
1$.
Pibbs&Buhem e,uation
A.
6.
B.
%.$
C.
).
D.
.
The number o# derees o# #reedom #or a mixture o# ice and water 8li,uid: are
A.
$
B.
'
C.
1
D.
6
On openin the door o# an operatin re#rierator kept in a closed room3 the temperature o# the room will
A.
increase
B.
decrease
C.
remain same
D.
increase in summer and will decrease in winter
14.
The internal enery o# a as obeyin P 8V & *: RT 8where3 * is a positi!e constant and has a constant C v: 3 depends upon its
A.
pressure
B.
!olume
C.
temperature
D.
all 8a:3 8b: H 8c:.
A7hen a as is expanded #rom hih pressure reion to low pressure reion Q temper &ature chane occursA. This phenomenon is related to the
A.
Pibbs&Buhem e,uation
B.
Pibbs&(elmholt- e,uation
C.
Third law o# thermodynamics
D.
Eoule"homson effect
$6. The internal enery o# an ideal as does not chane in a 1.
Bomestic re#rierator usually works on the """"""""""
re!ersible """""""""" process.
A.
hih temperature.
A.
isothermal
B.
adiabatic
B.
low pressure.
C.
isobaric
D.
isometric
C.
low temperature only.
D.
both low temperature and high pressure.
$/.
$1. 2an """""""""" system is exempli#ied by a !essel containin a !olatile li,uid in contact with its !apor.
A.
isolated
B.
closed
C.
open
D.
none o# these
$0.
Entropy chane #or an irre!ersible isolated system is
A.
U
B.
6
C.
<6
D.
>#
Maxwell@s relation correspondin to the identity3 dH dS Vd p % WKi dni is
A.
$$. In a 9&* diaram 8#or an ideal as:3 an isothermal cur!e will coincide withan adiabatic cur!e 8throuh a point:3 when B. A.
C p < C v
B.
C p 6 C v C.
C.
C p F C v
D.
C V C v D.
$'. 5or an ideal as3 the chemical potential is i!en by
A.
RT dlnP
B.
R d%nP
C.
R d%n!
D.
$.
(eat re,uirement #or decomposition o# a compound into its elements is """""""""" that is e!ol!ed durin the #ormation o# that compound #rom its elements.
A.
the same
B.
less than
C.
reater than
D.
di##erent than
none o# these
$). Two substances are in e,uilibrium in a re!ersible chemical reaction. I# the concentration o# each substance is doubled3 then the !alue o# the e,uilibrium constant will be
A.
same
B.
doubled
C.
hal!ed
A.
molar concentration
D.
one #ourth o# its oriinal !alue
B.
temperature
C.
internal enery
D.
none of these
$4.
The unit o# e,uilibrium constant o# a chemical reaction is the same as that o#
$. In the ammonia synthesis reaction3 N $ % '($ the #ormation o# N(' will be #a!oured by
$N(' % $$.) kcal3
'6. 7hich o# the #ollowin e,uations is obtained on combinin 1st and $nd law o# thermodynamics3 #or a system o# constant mass; D. A.
dE 6 Tds " PdV
B.
dQ C vd % PdV T
C.
dQ C pdT % Vdp
D.
Tds dE & PdV
'/.
'1. The oule&Thomson co&e##icient is de#ined as 8XT XP :H . Its !alue at the in!ersion point is
A.
U
B.
1
C.
#
D.
&!e
more or less Q dependin on the system.
) k moles o# an ideal as expands in !acuum spontaneously. The work done is
A.
)
B.
U
C.
#
D.
'$. 5uacity o# a component in an ideal as mixture is eu,al to the partial pressure o# that component in the mixture. The #uacity o# each component in a stable homoeneous solution at contant pressure and temperature """""""""" as its mole #raction increases.
A.
decreases
B.
decreases exponentially
C.
increases
D.
remains constant
'0.
''. Entropy is aan
A.
state #unction
B.
macroscopic property
C.
extensi!e property
D.
none of these
'.
'). In the reaction3 represented by3 $SO$ % O$ kcalQ the #orward reaction will be #a!oured by
A.
low temperature
B.
hih pressure
C.
both (a and (b
D.
neither 8a: nor 8b:
$SO'Q ( & )$
'4.
'. 2t triple point 8#or one component system:3 !apour pressure o# solid as compared to that o# li,uid will be
A.
Compressibility #actor 8i.e.3 the ratio o# actual !olume o# as to the !olume predicted by ideal as law: #or all ases are
A.
always reater than one.
B.
same at the same reduced temperature.
C.
same at the same reduced pressure.
D.
both(b (c.
7hich o# the #ollowin is not correct #or a re!ersible adiabatic process ;
A.
TV &1 constant
B.
p1&.T constant
C.
PV constant
D.
none of these
The e##iciency o# a Carnot heat enine operatin between absolute temperatures T 1and T( 8when3 T 1 F T $: is i!en by 8T 1 & T $:T 1. The co& e##icient o# per#ormance 8C.O.9.: o# a Carnot heat pump operatin between T 1 and T $ is i!en by
A.
T 1 F(T 1"T &
B.
T $8T 1&T $:
C.
T 1T $
D.
T $R 1
more )6.
B.
less
C.
same
Throttlin 8oule&Thomson e##ect: process is a constant """""""""" process.
A.
enthalpy
B.
entropy
C.
pressure
D.
none o# these
)/. The expression #or entropy chane i!en by3 S & nR ln 8P $P 1:3 holds ood #or
A.
expansion o# a real as.
B.
r eversible isothermal volume change.
C.
heatin o# an ideal as.
D.
coolin o# a real as.
)1. Goilin o# li,uid is accompanied with increase in the
A.
vapor pressure.
B.
speci#ic Pibbs #ree enery.
C.
speci#ic entropy.
D.
all 8a:3 8b: and 8c:.
)$. Chane o# state namely e!aportation condensation3 #ree-in and meltin is an """""""""" process.
A. C.
isothermal isobaric
B. D.
adiabatic
Gertholet e,uation
B.
Clausius Clayperon e)uation
C.
Geattie&Grideman e,uation
D.
None o# these
A.
low pressure and hih temperature.
B.
low pressure and low temperature.
C.
low temperature and high pressure.
D.
hih temperature and hih pressure.
). The di##erence between isothermal compressibility and adiabatic compressibility #or an ideal as is
C.
6 &!e
increases
B.
decreases
C.
remains unchaned
D.
may increase or decreaseQ depends on the substance
). It is desired to brin about a certain chane in the state o# a system by per#ormin work on the system under adiabatic conditions.
)). 2 as shows de!iation #rom ideal beha!iour at
A.
A. isochoric
)'. 7hich o# the #ollowin is not an e,uation o# state;
A.
)0. 7ith increase in temperature3 the internal enery o# a substance
B. D.
A.
he amount of wor needed is path dependent.
B.
7ork alone can not brin out such a chane o# state.
C.
The amount o# work needed is independent o# path.
ve U
D.
More in#ormation is needed to conclude anythin about the path dependence
constant temperature and pressure. or otherwise o# the work needed.
)4. 5or a constant pressure re!ersible process3 the enthalpy chane 8(: o# the system is
A.
C p.dT
C.
D.
SECTION 4 1.
$.
entropy
B.
ibbs energy
C.
internal enery
D.
enthalpy
C v. dT .
B.
A.
The work done in isothermal compression compared to that in adiabatic compression will be
/.
7hen li,uid and !apour phases o# one component system are in e,uilibrium 8at a i!en temperature and pressure:3 the molar #ree enery is
A.
more in !apour phase.
B.
more in li,uid phase.
C.
same in both the phases.
D.
replaced by chemical potential which is more in !apour phase.
(eat e!ol!edabsorbed durin con!ersion o# a substance #rom one allotropic #orm to another is termed as t he heat o#
A.
less
A.
#usion
B.
more
B.
!aporisation
C.
same
C.
transition
D.
more or less dependin upon the extent o# work done
D.
none o# these
9ick out the Claussius&Clayperon e,uation #rom the #ollowinJ
0.
7hat happens in a re!ersible adiabatic compression ;
A.
!eating occurs
B.
Coolin occurs
C.
9ressure is constant
D.
Temperature is constant
A.
B.
C.
D.
'.
.
none o# these
A.
&$0'
B.
6
C.
"';
D.
5or oranic compounds3 roup contribution method can be used #or the estimation o# 4.
).
Sublimation temperature o# dry ice 8solid CO$: is """""""""" ?C.
I# atmospheric temperature and dew point are nearly e,ual3 then the relati!e humidity is
A.
critical properties.
B.
speci#ic ra!ity.
A.
-ero
C.
speci#ic !olume.
B.
6=
D.
thermal conducti!ity.
C.
almost 1##K
D.
unpredictable
Speci#ic """""""""" does not chane durin phase chane at
16. The internal enery o# an incompressible #luid depends upon its
o# a i!en substances is i!en by the """""""""" e,uation.
A.
pressure
A.
Pibbs&Buhem
B.
temperature
B.
Maxwell@s
C.
both 8a: H 8b:
C.
Clayperon
D.
neither 8a: nor 8b:
D.
none o# these
11. Entropy chane in case o# re!ersible adiabatic process is 10. A.
minimum
B.
zero
C.
maximum
D.
indeterminate
1$. In reactions in!ol!in solids and li,uids 8where chane in !olume is neliible:3 the heat o# reaction at constant pressure as compared to that at constant !olume is
A.
more
B.
less
C.
same
D.
unpredictableQ depends on the particular reaction
1.
1'. 5or multicomponent multiple phases to be in e,uilibrium at the same pressure and temperature3 the """""""""" o# each component must be same in all phases.
A.
chemical potential
B.
#uacity
C.
both (a and (b
D.
neither 8a: nor 8b:
14.
1). The e##iciency o# an Otto enine compared to that o# a diesel enine3 #or the same compression ratio will be
A.
more
B.
less
C.
same
D.
data insu##icient to predict
$6.
1. Mollier chart is a """""""""" plot. $1.
9ick out the undesirable property #or a ood re#rierant.
A.
hih thermal conducti!ity
B.
low #ree-in point
C.
lare latent heat o# !aporisation
D.
high viscosity
Isotherm on an enthalpy&concentration diaram3 #or an ideal solution will be a
A.
straight line
B.
sine cur!e
C.
parabola
D.
hyperbola
The #usion o# a crystalline solid at its meltin point to #orm a li,uid at the same temperature is accompanied by
A.
decrease in enthalpy correspondin to e!olution o# heat.
B.
decrease o# entropy.
C.
increase in enthalpy corresponding to absorption of heat.
D.
no chane in enthalpy.
Meltin o# ice is an example o# an """""""""" process.
A.
adiabatic
B.
isothermal
C.
isometric
D.
none o# these
2 cylinder contains /)6 m o# li,uid oxyen. The !olume occupied 8in litres: by the oxyen3 when it is released and brouht to standard conditions 86?C3 0/6 mm (: will be """""""""" litres.
A.
pressure !s enthalpy
B.
pressure !s !olume
C.
enthalpy vs entropy
A.
@@;
D.
temperature !s entropy
B.
$$)
1/. *ariation o# e,uilibrium pressure with temperature #or any two phases
C.
$$.)
D.
data insu##icientQ can@t be computed
8XP XV :S 1y 8XP XV :T
D.
$.
Pibbs&(elmholt- e,uation is
$$. otary lime kiln is an example o# aan """""""""" system. A. A.
closed
B.
open
C.
isolated
D.
non&thermodynamic
$'. (eat o# reaction is
A.
dependent on pressure only.
B.
dependent on temperature only.
C.
dependent on both pressure and temperature.
D.
independent o# temperature chanes.
B.
F H & T T
C.
d 8E & TS: T 3 V < 6
D.
$4.
9ick out the wron statement.
A.
The net chane in entropy in any re!ersible cycle is always -ero.
B.
The entropy o# the system as a whole in an irre!ersible process increases.
C.
The entropy o# the uni!erse tends to a m aximum.
D.
he entropy of a substance does not remain constant during a reversible adiabatie change.
$). The expression3
A.
3 is #or the""""o# an ideal as.
compressibility
B.
work done under adiabatic contition
C.
wor done under isothermal condition
D.
co&e##icient o# thermal expansion
'6.
5uacity co&e##icient o# a substance is the ratio o# its #uacity to
A .
mole #raction
B .
acti!ity
C .
pressure
D .
acti!ity co&e##icient
$. 7hat happens in a re!ersible adiabatic expansion process ;
A.
(eatin takes place.
B.
Cooling taes place.
C.
9ressure is constant.
D.
Temperature is constant.
$/. Beree o# #reedom o# a system consistin o# a aseous mixture o# ($ and N( ' will be
A.
6
B.
1
C.
$
D.
%
$0. On a 9&* diaram o# an ideal as3 suppose a re!ersible adiabatic line intersects a re!ersible isothermal line at point 2. Then at a point 23 the slope o# the re!ersible adiabatic line 8X P XV :s and the slope o# the re!ersible isothermal line 8X P XV :T are related as 8where3 y C pC v:
A.
8XP XV :S 8XP XV :T
B.
8XP XV :S Y8X9X*:T
C.
(LP FLV S 6 y (LP FLV T
'1. Bryness #raction o# wet steam is de#ined as the ratio o# mass o# !apour in the mixture to the mass o# mixture """""""""" calorimeter is not used #or measurin the dryness #raction o# steam.
A.
Bomb
B.
Separatin
C.
Gucket
D.
Throttlin
'$. 2s the time is passin3 entropy o# the uni!erse
A .
is increasing
B .
is decreasin
C
remains constant
. D .
data insu##icient3 can@t be predicted
''.7hich o# the #ollowin processes can not be made re!ersible e!en under ideal condition o# operation;
A .
ree e3pansion of a gas.
B .
Compression o# air in a compressor.
C .
Expansion o# steam in a turbine.
D .
all 8a:3 8b: H 8c:.
A .
endothermic
B .
e3othermic
C .
isothermal
D .
adiabatic
'. 7ith increase in temperature3 the atomic heat capacities o# all solid elements
').The relation connectin the #uacities o# !arious components in a solution with one another and to composition at constant temperature and pressure is called the """""""""" e,uation.
A .
increases
B .
decreases
C .
remains unchaned
D .
decreases linearly
'4. The temperature at the eutectic point o# the system is the """""""""" temperature that can be attained in the system.
A .
ibbs"Duhem
A .
lowest
B .
*an +aar
B .
hihest
C .
Pibbs&(elmholt-
C .
a!erae
D .
Marules
D .
none o# these
'.7hich o# the #ollowin identities can be most easily used to !eri#y steam table data #or superheated steam.
A .
8XT XV :S 8X pXS:V
B .
8XT XP :S 8XV XS:P
C .
8XP XT :V 8XSXV :T
D .
(LV FLT P 6 "(LS FLP T
'/. In the e,uation PV n constant3 i# the !alue o# n y C pC v3 then it represents a re!ersible """""""""" process.
A .
isothermal
B .
adiabatic
C .
isentropic
D .
polytropic
'0. The ammonia synthesis reaction represented by N $ % '($
$N(' Q ( & $$.) kcal3 is
)6. The e##ect o# chanin the e!aporator temperature on CO9 as compared to that o# chanin the condenser temperature 8in !apour compression re#rieration system: is
A .
less pronounced
B .
more pronounced
C .
e,ual
D .
data insu##icient3 can@t be predicted.
)1. Steam underoes isentropic expansion in a turbine #rom 666 k9a and )66?C 8entropy /./ kk >: to 16 k9a: 8entropy o# saturated li,uid 1.)''/ kk . >3 entropy o# saturated !apour 0.$$') kk. >: The exit condition o# steam is
A.
superheated vapour.
B.
partially condensed !apour with ,uality o# 6.4.
C.
saturated !apour.
D.
partially condensed !apour with ,uality o# 6.1
)$.
2n isentropic process is carried out at constant
A.
volume
B.
pressure
C.
temperature
).
all 8a:3 8b: and 8c:
D.
)'. 2ll ases except """""""""" shows a coolin e##ect durin throttlin process at atmospheric temperature and pressure.
A.
oxyen
B.
nitroen
C.
air
D.
hydrogen
)).
(ih pressure steam is expanded adiabati&cally and re!ersibly throuh a well insulated turbine3 which produces some sha#t work. I# the enthalpy chane and entropy chane across the turbine are represented by H and S respecti!ely #or this processJ
A.
H 6 and S 6.
B.
H Z 6 and S 6.
C.
H Z 6 and S Z 6.
D.
H 6 and S Z 6.
)4.
6.
The necessary condition #or phase e,uilibrium in a multiphase system o# N components is that the
chemical potentials of a given component should be e)ual in all phases.
A.
C.
*iscosity
D.
None o# these
9ick out the wron statement.
A.
At constant pressure+ solubility of a gas in a li)uid diminishes with rise in temperature.
B.
Normally3 the ases which are easily li,ui#ied3 are more soluble in common sol!ents.
C.
The ases which are capable o# #ormin ions in a,ueous solution3 are much more soluble in water than in other sol!ents.
D.
2t constant pressure3 solubility o# a as in a li,uid increases with rise in temperature.
Pibbs phase rule #inds application3 when heat trans#er occurs by
A.
conduction
B.
con!ection
C.
radiation
D.
condensation
2bsorptione!olution o# heat durin con!ersion o# a substance #rom one allotropic #orm to another is termed a s the heat o#
A.
sublimation
B.
#usion
C.
transition
D.
!aporisation
SECTION 16 1.
Ideal as law is applicable at
chemical potentials o# all components should be same in a particular phase.
B.
A.
low T3 low 9
C.
sum o# the chemical potentials o# a ny i!en component in all the phases should be the same.
B.
hih T3 hih 9
D.
none o# these.
C.
low T3 hih 9
D.
high + low ,
)/. Compressibility #actor&reduced pressure plot on reduced co&ordinates #acilitates
A.
use of only one graph for all gases.
B.
co!erin o# wide rane.
C.
easier plottin.
D.
more accurate plottin.
)0. 7hich o# the #ollowin is not an intensi!e property ;
A.
Molar heat capacity
B.
$.
'.
educed pressure o# a as is the ratio o# its
A.
pressure to critical pressure.
B.
critical pressure to pressure.
C.
pressure to pseudocritical pressure.
D.
pseudocritical pressure to pressure.
5or a re!ersible process in!ol!in only pressure&!olume work
A.
8dF :T 3 p < 6
B.
8dF :T 3 p F 6
o#
).
.
C.
(dF T + p 6 #
A.
6 k calhr
D.
8dA:T 3 v < 6
B.
$66 GThr
C.
&## B0Fminute
D.
$66 GTday
2ir enters an adiabatic compressor at '66>. The exit temperature #or a compression ratio o# '3 assumin air to be an ideal as 8 C pC v 0: and the process to be re!ersible3 is
A.
%##(%&F'
B.
'668'':
C.
'668'''0:
D.
'668'0:
16.
Entropy chane #or an irre!ersible process takin system and surroundin toether is 11. A. B. C. D.
/.
.
A.
6
B.
1
C.
$
D.
'
E,uilibrium constant o# a reaction !aries with the
6 A.
initial concentration o# the reactant.
B.
pressure.
C.
temperature.
D.
none o# these.
># <6 none o# these
In a homoeneous solution3 the #uacity o# a component depends upon the 1$.
0.
7hat is the deree o# #reedom #or a system comprisin li,uid water e,uilibrium with its !apour ;
A.
pressure
B.
composition
C.
temperature
D.
all (a+ (b and (c
5or an incompressible #luid3 the """""""""" is a #unction o# both pressure as well as temperature.
A.
internal enery
B.
enthalpy
C.
entropy
D.
all 8a:3 8b: H 8c:
2n ideal monoatomic as is taken round the cycle ABC"A as shown below in the P+V diaram
1'.
1).
Third law o# thermodynamics is concerned with the
A.
value of absolute entropy.
B.
enery trans#er.
C.
direction o# enery trans#er.
D.
none o# these.
Claude@s li,ue#action process employs the coolin o# ases by
A.
e3pansion in an engine
B.
#ollowin a constant pressure cycle
C.
throttlin
D.
none o# these
Pibbs #ree enery 8F : is de#ined as
A.
F E & TS
B.
F 6 H " TS
C.
F H % TS
D.
F E % TS
The work done durin the cycle is
A.
PV
B.
$PV
C.
PV $
D.
6 1.
4.
One ton o# re#rieration capacity is e,ui!alent to the heat remo!al rate
The expression #or entropy chane i!en by3 S nR ln 8V $V 1: % nC v ln 8T $T 1: is !alid #or
A.
re!ersible isothermal !olume chane.
B.
heatin o# a substance.
C.
coolin o# a substance.
D.
simultaneous heating and e3pansion of an ideal gas.
in internal enery. D. $1.
1/. The second law o# thermodynamics states that
A.
the enery chane o# a system underoin any re!ersible process is -ero.
B.
it is not possible to trans#er heat #rom a lower temperature to a hiher temperature.
C.
the total enery o# system and surroundin remains the same.
D.
none of the above.
increases with increase in pressure.
B.
decreases with increase in temperature.
C.
is independent o# temperature.
D.
none of these.
$'.
1. 2 re#rierator works on the principle o# """""""""" law o# thermodynamics.
C.
second
B.
5uacity
B.
2cti!ity co&e##icient
C.
5ree enery
D.
All (a+ (b (c
D.
A.
non&#low re!ersible
B.
adiabatic
C.
both (a and (b
D.
neither 8a: nor 8b:
#or
The molar excess Pibbs #ree enery3 & E 3 #or a binary li,uid mixture at T and P is i!en by3 8& E RT : A . x 1. x $3 where A is a constant. The correspondin e,uation #or ln y 13 where y 1 is the acti!ity co&e##icient o# component 13 is
A.
A . x &&
B.
Ax 1
C.
Ax $
D.
Ax 1$
#irst third
14. 9ick out the wron statement.
A.
The con!ersion #or a as phase reaction increases with decrease in pressure3 i# there is an increase in !olume accompanyin the reaction.
B.
Gith increase in temperature+ the e)uilibrium constant increases for an e3othermic reaction.
C.
The e,uilibrium constant o# a reaction depends upon temperature only.
D.
A.
7ork done may be calculated by the expression """""""""" processes.
A.
-eroth
7hich o# the #ollowin is a##ected by the temperature ;
$$.
10. Internal enery o# an ideal as
A.
Claussius"clayperon e)uation is not applicable to melting process.
$).
The con!ersion #or a as phase reaction increases with increase in pressure3 i# there is a decrease in !olume accompanyin the reaction. $.
$6. 9ick out the wron statement.
A.
Enthalpies o# all elements in t heir standard states are assumed to be -ero.
B.
Combustion reactions are ne!er en&dothermic in nature.
C.
(eat o# reaction at constant !olume is e ,ual to the chane
The adiabatic throttlin process o# a per#ect as is one o# constant enthalpy
A.
in which there is a temperature drop.
B.
which is exempli#ied by a non&steady #low expansion.
C.
which can be performed in a pipe with a constriction.
D.
in which there is an increase in temperature.
5or spontaneous chanes in an isolated system 8S entropy:
A.
ds 6
B.
solubility
B.
ds <6
C.
temperature
C.
ds > #
D.
none of these
D.
ds Constant '$.
5uacity and pressure are numerically not e,ual #or the ases
$/ 2 as per#orms the maximum work3 when . it expands
$0.
A .
non& uni#ormly
B .
adiabatica lly
C .
isobarical ly
D .
isothermal ly
A.
volume
B.
pressure
C.
temperature
D.
all a3 b H c
7hich o# the #ollowin is *irial e,uation o# state;
A.
8 p % aV $:8V & *: nRT
B.
PV nRT
C.
PV 6 A B FV C FV & D FV % ...
').
D.
$4.
'6.
9ressure&enthalpy chart is use#ul in re#rieration. The chane in internal enery o# an ideal #luid used in ideal re#rieration cycle is
A.
positi!e
B.
neati!e
C.
zero
D.
in#inity
5irst law o# thermodynamics deals with the
A.
direction of energy transfer.
B.
re!ersible processes only.
C.
irre!ersible processes only.
D.
none o# these.
'.
B.
at standard state.
C.
both (a and (b.
D.
in ideal state.
2 solute distributes itsel# between two non&miscible sol!ents in contact with each other in such a way that3 at a constant temperature3 the ratio o# its concentrations in two layers is constant3 irrespecti!e o# its total amountA. This is
A.
the distribution law.
B.
#ollowed #rom Marule@s e,uation.
C.
a corollary o# (enry@s law.
D.
none o# these.
2 solid is trans#ormed into !apour without oin to the li,uid phase at
A.
triple point
B.
boilin point
C.
below triple point
D.
always
2 as mixture o# three components is brouht in contact with a dispersion o# an oranic phase in water. The deree o# #reedom o# the system are
A.
)
B.
%
C.
D.
/
'/. 1m' o# an ideal as at 66 > and 1666 k9a expands re!ersibly to times its initial !olume in an insulated container. I# the speci#ic heat capacity 8at constant pressure: o# the as is $1 mole . >3 the #inal temperature will be
'1. (enry@s law is closely obeyed by a as3 when its """""""""" is extremely hih.
A.
at low temperature and hih pressure.
There is a chane in """""""""" durin the phase transition. ''.
$.
A.
A.
' >
B.
10) >
C.
&'@ M
D.
1) >
pressure '0.
5or a thermodynamic system containin @x@ chemical species3 the
maximum number o# phases that can co&exist at e,uilibrium is )'. A.
x
B.
x%1
C.
3&
D.
x%'
'. 2 reasonably eneral expression #or !apour&li,uid phase e,uilibrium at low to moderate pressure is [ i y i P i x i ! i ? where3 [ is a !apor #uacity component3 i is the li,uid acti!ity co&e##icient and ! i? is the #uacity o# the pure component i. the K i !alue 8 i K i x i : is there#ore3 in eneral a #unction o#
'4.
A.
temperature only.
B.
temperature and pressure only.
C.
temperature+ pressure and li)uid composition x i only.
D.
temperature3 pressure3 li,uid composition x i and !apour composition y i .
Standard temperature and pressure 8S.T.9.: is
A.
6?C and 0/6 mm (
B.
1$:C and 'H# mm !g
C.
6?C and 1 k#cm $
D.
1?C and 1 k#cm $
)).
@The #uacity o# a as in a mixture is e,ual to the product o# its mole #raction and its #uacity in the pure state at the total pressure o# the mixtureA. This is
A.
the statement as per Pibbs&(elmholt-
B.
called 7ewis"=andall rule
C.
(enry@s law
D.
none o# these
"""""""""" does not chane durin phase trans#ormation processes like sublimation3 meltin H !aporisation.
A.
Entropy
B.
ibbs free energy
C.
Internal enery
D.
all 8a:3 8b: H 8c:
)6. Normal temperature and pressure 8N.T.9.: corresponds to ). A.
#:C and 'H# mm !g.
B.
1?C and 0/6 mm (.
C.
$?C and 0/6 mm (.
D.
6?C and 1 k#cm $.
)1. The minimum number o# phases that can exist in a system is
A.
6
B.
1
C.
$
D.
'
)$. Enthalpy chanes o!er a constant pressure path are always -ero #or """""""""" as.
A.
any
B.
a perfect
C.
an easily li,ue#iable
D.
a real
7hich one is true #or a throttlin process ;
A.
2 as may ha!e more than one in!ersion temperatures.
B.
he inversion temperature is different for different gases.
C.
The in!ersion temperature is same #or all ases.
D.
The in!ersion temperature is the temperature at which oule&Thomson co& e##icient is in#inity.
)/. Choose the condition that must be speci#ied in order to li,ui#y CO$ 8triple point #or CO$ is & 0?C and .$ atm:.
A.
9ressure must be kept below .$ atm.
B.
Temperature must be kept abo!e & 0?C.
C.
9ressure must be kept below .$ atm. and temperature must be kept abo!e 0?C.
,ressure and temperature must be ept below $.& atm. and " $':C respectively.
D.
C.
$. )0.
I# two pure li,uid constituents are mixed in any proportion to i!e an ideal solution3 there is no chane in
A.
!olume
B.
enthalpy
C.
both (a (b
D.
neither 8a: nor 8b:
'.
isentropic
Throttlin process is aan """""""""" process.
A.
re!ersible and isothermal
B.
irreversible and constant enthalpy
C.
re!ersible and constant entropy
D.
re!ersible and constant enthalpy
The main #eature o# Carnot re#rieration cycle is that3 it
A.
does not need the addition o# external work #or its #unctionin.
B.
trans#ers heat #rom hih temperature to low t emperature.
C.
accomplishes the reverse effect of the heat engine.
D.
none o# these.
Chemical potential o# ith component o# a system is i!en by
A.
B.
).
isobaric
D.
(eat o# reaction at constant !olume is identi#ied with """""""""" chane.
A.
enthalpy
B.
internal energy
C.
either 8a: or 8b:
D.
neither 8a: nor 8b:
C.
D.
)4. One mole o# nitroen at bar and /66 > i s contained in a piston& cylinder arranement. It is brouht to 1 bar isothermally aainst a resistin pressure o# 1 bar. The work done 8in oules: by the as is
.
Charles@ law #or ases states that
A. 6 Constant
6.
A.
'6)
B.
1#%'%
C.
)4.)
D.
)'/).4
B.
+en-@s law results #rom the law o# conser!ation o#
A.
mass
B.
momentum
C.
energy
D.
none o# these
C.
D. Constant /.
I# heat contents o# C()3 C$() and C'( are &10.43 1$. and &$). kcalmole respecti!ely3 than ( #or the reaction C( )8& : % C$()8& :
C'(8& : will be """""""""" >cal.
SECTION 11 In the e,uation3 PV n constant3 i# the !alue o# n is in between 1 and y 8i .e. C pC v: 3 then it represents a re!ersible """""""""" process.
A.
isometric
B.
A.
"1.@
B.
&'6.$
C.
.$
D.
&.$
polytropic 0.
(elmholt- #ree enery 8 A: is de#ined as
.
4.
A.
A H & TS
B.
A 6 E " TS
C.
A H % TS
D.
none o# these
A.
*an +aar e,uation
B.
Marules e,uation
C.
7ilson@s e,uation
D.
all (a+ (b and (c
1).
2s pressure approaches -ero3 the ratio o# #uacity to pressure 8! P : #or a as approaches
The e,uation3 3 applicable to a binary solution o# components. A and B in e,uilibrium with their !apors at constant temperature and pressure is called the """""""""" e,uation.
A.
-ero
B.
unity
A.
*an +aar
C.
in#inity
B.
Marules
D.
an indeterminate !alue
C.
Pibbs&Buhem
D.
ibbs"Duhem"argules
5or any system3 what is the minimum number o# derees o# #reedom; 1. A.
1
B.
#
C.
$
D.
'
16. 2t /6? C3 !apour pressure o# methanol and water are )./$ k9a and 14.4' k9a respecti!ely. 2n a,ueous solution o# methanol at /6? C exerts a pressure o# '4.$$' k9aQ the li,uid phase and !apour phase mole #ractions o# methanol are 6.1// and 6.01) respecti!ely. 2cti!ity co&e##icient o# methanol is
A.
1.$'&
B.
1.4'4
C.
'.'4
D.
).$'
1/.
11. The !ariation o# heat o# reaction with temperature at constant pressure is i!en by the """""""""" law.
Entropy o# a substance remains constant durin aan """""""""" chane.
A.
re!ersible isothermal
B.
irre!ersible isothermal
C.
reversible adiabatic
D.
none o# these
Pases are cooled in oule&Thomson expansion3 when it is """""""""" in!ersion temperature.
A.
below
B.
at
A.
>el!in@s
C.
abo!e
B.
2ntonie@s
D.
either @b@ or @c@
C.
Mirchoffs
D.
none o# these
10.
1$. 2t absolute -ero temperature3 the """""""""" o# the as is -ero.
PV y constant3 holds ood # or an isentropic process3 which is
A.
re!ersible and isothermal.
B.
isothermal and irre!ersible.
A.
pressure
C.
reversible and adiabatic.
B.
volume
D.
adiabatic and irre!ersible.
C.
mass
D.
none o# these
1'. 7hich o# the #ollowin e,uations is used #or the prediction o# acti!ity co&e##icient #rom experiments ;
1.
7hich o# the #ollowin represents the *irial e,uation o# state ;
A.
A.
*#
B.
F6
C.
6
D.
none o# these
B.
C.
D.
n1,$ % K$K1 6
$).
14. The e,uilibrium constant #or a chemical reaction at two di##erent temperatures is i!en by
A.
2 system is said to be at e,uilibrium3 i# the entropy o# the system has reached """""""""" !alue.
A.
minimum
B.
-ero
C.
ma3imum
D.
none o# these
B. $.
C.
$/.
In the e,uation3 PV n constant3 i# the !alue o# n \ U3 then it represents a re!ersible """""""""" process.
A.
adiabatic
B.
isometric
C.
isentropic
D.
isothermal
Beree o# #reedom o# the system ice&water&!apour will be
D.
$6. 7hich o# the #ollowin beha!es most closely like an ideal as ;
A.
!e
B.
N$
C.
O$
D.
($
$1. In the reaction3 C % O$ content 8enthalpy:o# O $;
A.
&4) kcal
B.
F &4) kcal
C.
< & 4) kcal
D.
zero
$0.
CO$ Q ( & 4) kcal. 7hat is the heat
$.
$$. 5or a constant !olume process """""""""" by the system is used only to increase the internal enery.
$4.
A.
#
B.
1
C.
$
D.
'
2 system in which there is exchane o# enery but not o# mass3 is called aan """""""""" system.
A.
isolated
B.
open
C.
insulated
D.
closed
The point at which all the three 8solid3 li,uid and as: phases co&exist3 is known as the """""""""" point.
A.
#ree-in
B.
triple
C.
boilin
D.
Goyle
In an ideal as mixture3 #uacity o# a species is e,ual to its
A.
heat absorbed
A.
!apor pressure
B.
work done
B.
partial pressure
C.
both 8a: H 8b:
C.
chemical potential
D.
neither 8a: nor 8b:
D.
none o# these
$'. 7hen a system is in e,uilibrium #or all possible processes3 the di##erential or #inite chane o# entropy is
'6.
oule&Thomson co&e##icient is de#ined as
'.
A.
In the decomposition o# 9Cl represented by3 9Cl 9Cl' % Cl$3 decrease in the pressure o# the system will """""""""" the deree o# dissociation o# 9Cl .
B.
C.
A .
increase
B .
decrease
C .
not alter
D .
none o# these
D. '/.To obtain interated #orm o# Clausius&Clayperon '1. The third law o# thermodynamics states that the
A.
heat capacity of a crystalline solid is zero at absolute zero temperature.
B.
heat trans#er #rom low temperature to hi h temperature source is not possible without external work.
C.
ases ha!in same reduced properties beha!e similarly.
D.
none o# these.
e,uation3 3 #rom the exact Clayperon e,ua#ion3 it is assumed that the
A.
!olume o# the li,uid phase is neliible compared to that o# !apour phase.
B.
!apour phase beha!es as an ideal as.
C.
heat o# !aporisation is independent o# temperature.
D.
all (a+ (b (c.
'$. Consider the reaction3 C % O $ CO$ Q( & 4) kcal. 7hat will be the !alue o# ( #or the reaction CO $ C % O$ ;
A.
&4) kcal
B.
@ cal
C.
F 4) kcal
D.
< &4) kcal
'0.
In case o# an """""""""" process3 the temperature o# the system increases.
A.
isothermal compression
B.
isothermal expansion
C.
adiabatic expansion
D.
adiabatic compression
''. 7hich is a state #unction ; '.
The standard state o# a as 8at a i!en temperature: is the state in which #uacity is e,ual to
A.
Speci#ic !olume
B.
Gor
A.
unity
C.
9ressure
B.
acti!ity
D.
Temperature
C.
both (a (b
D.
neither 8a: nor 8b:
'). 5or an ideal li,uid solution3 which o# the #ollowin is unity ; '4.
C p o# a as at its critical temperature and pressure
A.
2cti!ity
B.
5uacity
A.
becomes -ero.
C.
Activity co"efficient
B.
becomes infinity.
D.
5uacity co&e##icient
C.
e,uals 1 kcalkmol ?>.
