Past Papers (2nd Year)
Board of Intermediate and Secondary Education Rawalpindi
Chemistry-II (2006-2015)
Chemistry-II
2006
(Subjective Type-46 Marks) Section-I (Short Questions) Q: 1 Write short answers of any EIGHT questions. (8x2=16) (i) Carbon dioxide is a gas but silicon dioxide is a solid. Why? (ii) Why are silicones better lubricants than petroleum products? (iii) Why hydration energy decreases from top to bottom in group-I A and increases from left to right in the period? (iv) What is aqua regia? How it dissolves noble metals in it? (v) Ketones do not give silver mirror test but Aldehydes do so. Give reason. (vi) Why melting points and boiling points of alcohols are higher than corresponding alkanes? (vii) Why is phenoxide ion more stable than ethaoxide ion? (viii) What is condensation polymerization? Give an example. (ix) How is pulp washed? (x) How water is purified by aeration? (xi) Why pink colour of KMnO4 is discharged when it reacts with alkene? (xii) Butanone on oxidation gives two molecules of acetic acid. Give reason. Section-II (Essay Type) Attempt any THREE questions from this section. (3x10=30) Q: 2 (a) How do you compare the elements of group 1-A and ll-A in metallic character, ionization potential values & solubilities of carbonates? Give reasons. (b) Give four properties for HNO3 in which it acts as oxidizing agent. Give balanced equations to support your answer. (c) What are silicates? Give their important uses. Q: 3
(a) Write note on contact process for preparation of H2SO4. (b) Write three applications of Noble gases. (c) What are advantages of Mendeleev periodic table?
Q: 4
(a) Explain, H2SO4 acts as an oxidizing agent. (b) Write a note on cracking of hydrocarbons? (c) How following compounds can be obtained from Ethyl Bromide. (i) Quaternary ethyl Ammonium Bromide (ii) Ethyl thio-Alcohol (iii) Tetra Ethyl Lead
Q: 5
(a) What is LUCA’S Test? (b) Convert: (i) Benzene into Maleic Acid (ii) Toluene into T.N.T. (iii) Ethyne into Methyl Nitrile (iv) Ethyl alcohol into Ethyl acetate (c) What is meant by condensation reaction? Discuss mechanism of aldol condensation in aldehydes.
Q: 6
(a) Write open chain structures of glucose and fructose. (b) How you can prepare urea from carbon dioxide and ammonia? Give its flow sheet diagram. (c) What is acid rain? How does it affect our environment?
(Objective Type-29 Marks) Q: 7 Encircle the correct answer. (i) The element which possesses the smaller value of ionization potential is _____________. (ii) The oxide of nitrogen which causes hysterical laughter is _____________. (iii) Which one of the inert gases is used in bactericidal lamp? (iv) The first d-block transition series ends on _____________. (v) Which one of the following is not a destructive distillation product of coal? (vi) Sodium acetate on electrolysis evolves the _____________ gas on anode. (vii) Which one of the following compound is not used for the preparation of benzene? (viii) The method particularly useful for the preparation of Alkyl Iodides is _____________. (ix) Methanol is converted into Methanal by _____________. (x) Which one of the compound is a powerful eye irritant?
(10x1=10)
Q: 8 Complete the following sentences. (10x1=10) (i) Non metals form oxides _____________. (ii) Formula of cryolite is _____________. (iii) Tincture of _____________ is a common anti septic (iv) MnO4- has _____________colour. (v) Benzene has _____________ structure (vi) Best method for preparation of ethyl halides is the reaction of _____________with inorganic reagents. (vii) _____________is also called wood spirit. (viii) Aldehydes and Ketones give _____________addition reaction. (ix) Glucose is stored as _____________in the liver. (x) _____________is frequently used to disinfect water. Q: 9 Match Column A with Column B.
(9x1=9)
COLUMN A
COLUMN B
Micronutrient
Zinc
Ligase
Enzyme
Lipids
Sterols
Alkyl halide
Carbonium ion
Ethyne
Welding
Chalcogen
Oxygen
Acid soil
CaO
Silicones
Lubricant
Halothane
Anesthesia
Chemistry-II
2007
(Subjective Type-46 Marks) Section-I (Short Questions) Q: 1 Write short answers of any EIGHT questions. (8x2=16) (i) Why anion is always bigger than its parental atom? (ii) What are the advantages to perform the process at 600 °C in Down’s cell? (iii) What is Ring Test? Give reaction. (iv) Why halogens are electro-negative and oxidizing agent? (v) What is thermal cracking? Give examples. (vi) What s catalytic hydrogenation? Give example. (vii) How you prove that Benzene is a stable molecule? (viii) What are two applications of Grignard’s reagent? (ix) Ethane gives different products with H2SO4 under different conditions. Explain. (x) What are peptides? Give example. (xi) What is the role of phosphorous in plant growth? Give names of some phosphorous fertilizers. (xii) What is the importance of gases present in atmosphere? Section-II (Essay Type) Attempt any THREE questions from this section. Q: 2 (a) How melting points and boiling points of elements vary in the periodic table? (b) What is the effect of heat on the compounds? (i) NaNO3, (ii) Ca(OH)2 (iii) Mg(NO3)2 (c) H2SO4 is dehydrating agent. Explain with three examples.
(3x10=30)
Q: 3
(a) How carbon differs from the other members of group IV A? Give the structure of carbon monoxide and carbon dioxide. (b) Give the reaction of bleaching powder with dilute H2S04, dilute HCI and NH3. (c) How Wrought Iron is prepared from Cast Iron?
Q: 4
(a) Define Geometric Isomerism. Give two examples. (b) How can you prepare ethane & ethyne by Kolle’s method? (c) Give mechanism of SN2 and SN1 - reactions.
Q: 5
(a) Write down the mechanism of Nitration and Alkylation of Benzene. (b) Explain the oxidation of Alcohols. (c) How will you convert? (i) Acetone into ter-butyl alcohol (ii) Ethanal into 2-propenol
Q: 6
(a) What are polymers? Discuss different types of polymers. (b) How is Ammonium Nitrate manufactured in Pakistan? Describe the process in detail. (c) What is Acid Rain? How does it affect our environment?
(Objective Type-29 Marks) Q: 7 Encircle the correct answer. (10x1=10) (i) Which one is the best metal? (ii) Which element is deposited at cathode during the electrolysis of brine in Nelson’s cell? (iii) Laughing gas is chemically _____________. (iv) Coordination number of Pt in [PtCl(NO)(NH3)4]-2 is _____________. (v) Ethers showed the phenomenon of _____________. (vi) The formula of chloroform is _____________. (vii) In secondary alkyl halides halogen atom is bonded with carbon which is further attached to how many carbon atoms? (viii) Rectified spirit contains alcohol about _____________. (ix) The reaction between fat and NaOH is called _____________. (x) Peroxyacetyl nitrate (PAN) is an irritant to human beings and its affects _____________. Q: 8 Complete the following sentences. (10x1=10) (i) The binary compounds of _____________ with other elements of the periodic table are called halides. (ii) Boron forms _____________ bonds in its compounds. (iii) The only halogen acid which is not a strong acid is _____________. (iv) The oxidation number of Fe in K3[Fe(CN)6] is _____________. (v) Mustard gas is a high boiling _____________. (vi) The introduction of halogen group in benzene ring is called _____________. (vii) Aldehydes are the first oxidation product of _____________. (viii) Formula of malonic acid is _____________. (ix) Ammonia contains _____________% Nitrogen. (x) The substances which can directly kill the unwanted organism are called _____________. Q: 9 Match Column A with Column B.
(9x1=9)
COLUMN A
COLUMN B
Cinnabar
HgS
Heavy spar
BaSO4
Rancidity
Unpleasant smell in fats
Denaturation
Boiled eggs
Saponification
Fats + NaOH
Oxyacid
HXO4
Corrosive to glass
HF
Down’s method
Phenol
Esterification
Alcohol + Carboxylic acids
Chemistry-II Time: 20 minutes
2008
(Objective Type)
Marks: 17
Q: 1 Encircle the correct option. (17x1=17) (i) The oxides of electropositive elements are _____________. (A) Acidic (B) Basic (C) Amphoteric (D) Neutral (ii) Which one is more soluble in water? (A) Be(OH)2 (B) Mg(OH)2 (C) Ba(OH)2 (D) All of these (iii) Which one is more stable? (A) H3BO3 (B) HBO2 (C) H2B4O7 (D) H6B4O9 (iv) Laughing gas is _____________. (A) NO (B) NO2 (C) N2O (D) N2O3 (v) Most powerful oxidizing agent is _____________. (A) CI2 (B) Br2 (C) F2 (D) I2 (vi) Formula of chromyl chloride is _____________. (A) Cr2OCl2 (B) CrO2Cl2 (C) Cr2OCl3 (D) CrOCl2 (vii) Which of the following compounds may exist as cis-trans isomers? (A) 1-Butene (B) 2-Butene (C) Cyclopropane (D) Acetone (viii) Baeyer’s reagent is _____________. (A) Dil. alkaline KMnO4 (B) HCl + ZnCl2 (C) Br2 in CCl4 (D) All of these (ix) Benzene reacts with alkyl and Acylhalides in presence of AICl3. This reaction is _____________. (A) Friedel and Crafts reaction (B) Aldol condensation (C) Halogenation reaction (D) Nitration reaction (x) Elimination bimolecular reactions involve kinetics _____________. (A) 1st order (B) 2nd order (C) 3rd order (D) Zero order (xi) Which of the following reagent will replace -OH group of alcohol by a Halogen atom? (A) HOCI (B) Br2 (C) SOCl2 (D) I2 (xii) Ketones are always reduced to _____________. (A) Pri. Alcohol (B) Sec. Alcohol (C) Ter. Alcohol (D) None (xiii) Tryosine was first isolated from _____________. (A) Sugar (B) Cheese (C) Butter (D) Milk (xiv) Which of these polymers is an addition polymer? (A) Nylon-6, 6 (B) Polystyrene (C) Terylene (D) Epoxy resin (xv) The natural fertilizer is called _____________. (A) Manure (B) Urea (C) Super phosphate (D) Ammonium sulphate (xvi) Bio chemical oxygen demand is the capacity of organic matter in natural water to consume oxygen with in a period of _____________. (A) Three days (B) Four days (C) Five days (D) Six days (xvii) Peroxyacetyl nitrate is an irritant to human beings and it affects _____________. (A)Eyes (B) Ears (C) Stomach (D) Nose
Time: 3:10 hours
(Subjective Type)
Marks: 68
Section-I (Short Questions) Q: 2 Write answers of any TWENTY TWO questions. (i) Give variation of following properties down a group and across a period. (a) Ionization energy (b) Electron affinity (ii) Give two similarities and two differences of Hydrogen with IV group of periodic table. (iii) Write two methods for preparation of NO giving balanced equations.
(22x2=44)
(iv)
Complete and balance following equations. (a) KMnO4 + H2SO4 + HNO3 → (b) HNO2 + Br2 + H2O → (v) Define functional group. Name two functional groups containing oxygen. (vi) Define the following with one example. (a) Position isomerism (b) Functional group isomerism. (vii) Write equations for reaction of C2H5OH with PBr3 and PCI5. (viii) Give equations for reaction of C2H5MgBr with Ethylene epoxide and Ethanal. (ix) Write structural formulas of Malonic acid and Phthalic acid. (x) Write equations for preparation of carboxylic acids from following (a) Alkyl nitriles (b) Oxidative cleavage of alkenes (xi) Define solid waste management. (xii) Give chemical formulas for (a) Beryl (b) Asbestos (xiii) How lime mortar is prepared? (xiv) Why iodine has metallic luster? (xv) Name two gases, one of which is used for earthquake prediction and other is used in bactericidal lamps. (xvi) How mustard gas is prepared from ethane? Also give IUPAC name of mustard gas. (xvii) Give equation with conditions of reaction to show cyclic polymerization of acetylene. (xviii) Give a chemical test to distinguish methyl alcohol and ethyl alcohol. (xix) How does ethyl alcohol react with PCI5 and conc. H2SO4? (xx) Why ethyl alcohol is-liquid while methyl chloride is a gas? (xxi) What are monosaccharides? Give cyclic structure of β-D-Glucose. (xxii) Explain with example the term “Condensation Polymerization”. (xxiii) Why is CO2 a gas at room temperature while SiO2 is solid? (xxiv) What are silicones? Give one example. (xxv) Give equation when Borax is heated with NH4CI and CoO. (xxvi) Why does damaged tin plated iron get rusted quickly? (xxvii) Give systematic names of the following complexes. (a) [Fe(CO)5] (b) [Co(NH3)6]Cl3 (xxviii) Complete the following reactions (a) C6H6 + SO3 → (b) C6H5-SO3H + H-OH → (xxix) Draw the structural formula of the following: (a) o-Bromonitrobenzene (b) o-Ethyl-toluene. (xxx) What type of aldehyde gives aldol condensation? Give example. (xxxi) How does formaldehyde react with the reagents? (a) CH3Mgl (b) HCN (xxxii) What do you mean by dry cleaning in paper manufacture? (xxxiii) What do you mean by setting of cement? Section-II (Essay Type) Attempt any THREE questions from this section. Q: 3 (a) Describe the role of lime in industry. (b) Give the reactions of H2SO4 with (i) Oxalic acid (ii) Starch (iii) Sulphur (c) Write preparation and properties of Iodine Pentaoxide.
(3x8=24)
Q: 4
(a) Define isomerism with example. What type of isomerism is found in ethers? Explain it with example. (b) How ethyl magnesium bromide reacts with followings: (i) (CH3)2CO (ii) CO2 (iii) CH3CHO (c) Give the products of the reaction of phenol with acetyl chloride and bromide.
Q: 5
(a) How will you prepare the compounds from ethyne? (i) Benzene (ii) Acetaldehyde (iii) Chloroprene (iv) Ethane (v) Methyl nitrite (b) Describe with mechanism Cannizzaro’s reaction.
Q: 6
(a) Write down three reactions in which benzene behaves as if it is a saturated hydrocarbon. (b) Discuss the mechanism of the reaction between a carboxylic acid and an alcohol. (c) What is coagulation?
Q: 7
(a) What are lipids? In what way fats and oils are different? (b) Describe the different zones of the rotary kiln with temperature in the manufacture of cement. (c) Define and give examples of (i) Ligand (ii) Coordination Number
2009
Chemistry-II Time: 20 minutes
(Objective Type)
Marks: 17
Q: 1 Encircle the correct option. (i) Which of the following elements from polymeric halides? (A) Be (ii)
(C) Protein
(D) All of these
(B) Zn
(C) Cu
(D) None of these
(B) NO
(C) NO2
(D) None of these
Which of halogens is solid at room temperature? (A) F2
(vi)
(B) Plant
Which of the following gas is evolved when copper reacts with dill HNO3? (A) N2O
(v)
(D) All of these
Nitric acid can be transported in a container made up of: (A) Al
(iv)
(C)AI
Sulphur is an essential constituent of: (A) Chlorophyll
(iii)
(B) Ga
(17x1=17)
(B) Cl2
(C) Br2
(D) l2
(C) Tetrahedral
(D) Trigonal bipyramidal
(C) Amides
(D) Carboxylic acids
The geometrical shape of PCI5 is: (A) Octahedral
(B) Square planar
(vii) Urea belongs to which class compounds? (A) Imides
(B) Amines
(viii) Addition of hydrogen accompanied by a bond cleavage is called: (A) Hydrogenation (ix)
(x)
(C) Hydrogenolysis
(D) Hydroxylation
Aromatic compounds give sooty flame because they: (A) Resist the reaction with air
(B) Contains high percentage of carbon
(C) Have stable structure
(D) Have a cyclic structure
In SN2 mechanism the hybridization of carbon atom changes from sp3 to: (A) sp2
(xi)
(B) Hydrolysis
(B) sp
(C) dsp2
(D) None of these
Which of the following possess higher boiling point? (A) Methanol
(B) Ethanol
(C) n-Hexane
(D) Glycol
(B) Dehydration
(C) Rearrangement
(D) None of these
(B) Di-carboxylic
(C) Tri-carboxylic
(D) None of these
(xii) Aldol product on heating undergoes: (A) Decomposition (xiii) Phthalic acid is a: (A) Mono-carboxylic
(xiv) Degree of polymerization is useful in the: (A) Structure determination of polymers
(B) Calculating the mass of repeating units
(C) Calculating molecular mass of polymers
(D) Classification of polymers
(xv) Which of the elements is not a micronutrient? (A) Cu
(B) Fe
(C) Mg
(D) Mo
(xvi) Half of the mass of atmosphere is concentrated in lower: (A) 4.6 km
(B) 5.6 km
(C) 3.6 km
(D)15 km
(xvii) Lithosphere extends in earth up to the depth of: (A) 50 km
(B) 100 km
(C) 150 km
(D) 30 km
Time: 3:10 hours
(Subjective Type)
Marks: 68
Section-I (Short Questions) Q: 2 Write answers of any TWENTY TWO questions. (i) Why oxidation state of noble gas is zero? (ii) Explain why electron affinity of dinegative ion is endothermic? (iii) What is effect of heat on nitrates of alkali and alkaline earth metals? (iv) Write down the advantages of Down’s cell. (v) How does borax serves as a water softening agent? (vi) What are silicones? (vii) Why are liquid silicones preferred over ordinary organic lubricants? (viii) Why the elements of group VI A other than oxygen show more than two oxidation states? (ix) Why does aqua regia dissolve gold and platinum? (x) Why HF is weaker acid than HCI? (xi) How the halogen acids are ionized in water? (xii) Why does damaged tin plated iron get rusted quickly? (xiii) Give systematic names of the following complexes. (a) [Fe(CO)5] (b) [Co(NH3)6]Cl3 (xiv) What are Homo cyclic and Hetero cyclic compounds? Give one example of each. (xv) What is meant by functional group? Give one example. (xvi) Write structural formula of the following compounds: (a) Iso-butylene (b) 1, 3-Pentadiene (xvii) What is meant by octane number? (xviii) What is meant by term oxidation and sulphonation? (xix) Write the mechanism of the electrophilic aromatic substitution reactions. (xx) Give mechanism of E1 reactions. (xxi) Write two methods for preparation of Grignard reagent. (xxii) Why Ethyl alcohol is a liquid while methyl chloride is a gas? (xxiii) What is rectified and commercial alcohol? (xxiv) Which are those weak oxidizing agents which can oxidize aldehydes but not ketones? (xxv) What is Benedict’s solution test? (xxvi) What are acid anhydrides and how are they produced? (xxvii) What are essential and non essential amino acids? (xxviii) Classify the polymers on basis of types of monomers. (xxix) How acrlon is prepared? Give its uses. (xxx) What are micro nutrients? Write their names. (xxxi) Define paper. Give important raw material for the manufacture of paper. (xxxii) What are the components of environment? (xxxiii) What is COD? How it is measured?
(22x2=44)
Section-II (Essay Type) Attempt any THREE questions from this section. Q: 3 (a) Give six points to compare the chemical behaviour of lithium with other alkali metals (b) Give six dissimilarities between oxygen and sulphur. (c) What happens when bleaching powder react regents? (i) Excess of conc. H2SO4 (ii) NH3
(3x8=24)
Q: 4
(a) What is “Vital Force Theory”? How it came to end by “Wohler’s work? (b) Complete reactions of Grignard’s reagent (RMgX) with (i) Ethylene oxide (ii) Alcohol (R-OH) (iii) Ammonia (NH3) (c) How Bakelite plastic is ultimately obtained as result of reaction between formaldehyde and phenol?
Q: 5
(a) Write down any three methods of preparation and any two chemical properties of alkanes. (b) Define Cannizzaro’s reaction with two examples.
Q: 6
(a) How will you prepare by starting from benzene? (i) Maleic anhydride (ii) Glyoxal (iii) Benzene sulphuric acid (b) Explain acidic and basic characters of amino acids with the help of suitable examples. (c) What is the recycling of the municipal waste?
Q: 7
(a) Explain the following terms. (i) Coordination Number (b) Write down briefly three properties of Enzymes. (c) Write down any six qualities of a good fertilizer.
(ii) Coordination Sphere
Chemistry-II Time: 20 minutes
(Objective Type)
Q: 1 Encircle the correct option. (i) (ii)
(iii) (iv) (v) (vi) (vii) (viii) (ix) (x) (xi) (xii) (xiii) (xiv) (xv) (xvi) (xvii)
2010 Marks: 17 (17x1=17)
Enzyme, which is not involved in fermentation of starch is: (A) Diastase (B) Zymase (C) Urease (D) Invertase Acidified oxidizing agent used for the laboratory preparation of Acetaldehyde is: (A) K2Cr2O7 + H2O (B) Na2Cr2O7 + H2SO4 (C) K2Cr2O7 + H2S (D) Na2Cr2O7 + NO2 Acetic acid is manufactured by. (A) Esterification (B) Distillation (C) Sublimation (D) Fermentation Enzyme used for the diagnosis of obstructive jaundice is: (A) LDH-1 (B) L-Asperginase (C) Lipase (D) Alkaline phosphatase Group VI B of transition elements contains: (A) Zn,Cd.Hg (B)Fe,Ru,Os (C) Cr, Mo, W (D) Mn, Te, Re In Ethene each carbon atom is: (A) sp3-hybridized (B) sp2-hybridized (C) sp-hybridized (D) un-hybridized Acetone is prepared by the hydrolysis of: (A) Ethyne (B) Propyne (C) Ethane (D) Propane Catalyst used in Friedal-craft reaction is: (A) HNO3 (B) BeCl2 (C) NaCl (D) AlCl3 Tertiary Alcohol is obtained by treating Grignard reagent with: (A) HCHO (B) CH3CHO (C) CH3COCH3 (D) CO2 Macronutrients are required per acre in quantity ranging from: (A) 2-200 kg (B) 3-200 kg (C) 4-200 kg (D) 5-200 kg Peroxy Acetyl Nitrate (PAN) is an irritant to human being and it affects: (A) nose (B) stomach (C) eyes (D) nose Newspaper can be recycled again and again by how many times? (A) 2 (B) 3 (C) 4 (D) 5 Zinc oxide is: (A) Basic (B) Amphoteric (C) Acidic (D) Neutral Soda lime is often employed to remove both: (A) H2O and NO2 (B) CO2 and NO2 (C) H2O and CO2 (D) H2S and CO2 Asbestos is commonly used in making: (A) Wall board (B) Black board (C) Soft board (D) Hard Board The most electronegative element in group-VA is: (A) Sb (B) N (C)P (D) As Gas used as a cooling medium for nuclear reactor is: (A) H2 (B) Cl2 (C) He (D) SO2
Time: 3:10 hours
(Subjective Type)
Marks: 68
Section-I (Short Questions) Q: 2 Write answers of any TWENTY TWO questions. (22x2=44) (i) Define amphoteric oxides. Give an example. (ii) Why atomic radius decreases from left to right in a period and increases from top to bottom in a group? (iii) What role is played by ‘Ca’ in plant growth? (iv) Write down names and formulas of two ores of Potassium.
(v) Write down two uses of boric acid. (vi) Explain chemistry of Borax-bead test. (vii) Complete and balance the chemical equations. (a) Zn + HNO3(conc.) → (b) Cu + HNO3(dil.) → (viii) Prove with chemical equation that P2O5 is a powerful dehydrating agent. (ix) Give two applications of iodine. (x) What is iodized salt? (xi) Give one chemical equation to explain chromyl chloride test. (xii) Differentiate with respect to composition between wrought iron and steel. (xiii) Define octane number. How it can be improved? (xiv) Write down structural formulas of two possible isomers of C4H10. (xv) Justify that 1-Butene does not show geometric isomerism but 2-Butene does? (xvi) How will you convert 2-butyne into cis-2-butene? (xvii) Identify each lettered product: PCl5
Na/ether
CH3CH2OH → A → B (xviii) Complete the following reactions: (a) Propene + Br2 → (CCl4 as catalyst) (b) Ethyl Alcohol + Conc. H2SO4 → (at 180 °C) (xix) Give name and structure of one bicyclic and one tricyclic aromatic hydrocarbon. (xx) What informations are drawn from x-ray studies of benzene? (xxi) Prepare maleic acid from benzene with the help of chemical equations. (xxii) Define the following with one example in each case: (a) Nucleophile (b) Leaving group (xxiii) Explain mechanism of SN2 reaction. (xxiv) How will you convert methanol into ethanol? (xxv) Write down the structural formulas and IUPAC names of the compounds (a) Lactic Acid (b) Tartaric acid (xxvi) Write the mechanism of addition of HCN to acetone. (xxvii) How will you prepare crotonaldehyde from acetaldehyde? Give equations also. (xxviii) What is Zwitter-ion structure of amino acids? Give an example. (xxix) Convert acetic acid to acetamide with the help of chemical equations. (xxx) Differentiate between DNA and RNA. (xxxi) How oil spillage is is affecting the marine life? (xxxii) What are the common bleaching agents used in paper industry in Pakistan? Briefly describe the bleaching process. (xxxiii) Justify that CO is highly poisonous for human health. How the CO poisoning can be reversed? Section-II (Essay Type) Attempt any THREE questions from this section. Q: 3 (a) How elements in the periodic table are classified into blocks? (b) Discuss peculiar behavior of lithium. (c) How Al reacts with (i) Hydrogen (ii) Oxygen.
(3x8=24)
Q: 4
(a) What is chain isomerism? Draw possible skeletal formulas of isomers of hexane and write down their IUPAC names. (b) Describe β-elimination. (c) Give reactions of diethyl ether with (i) HI (ii) PCI5
Q: 5
(a) Describe any five rules for naming alkanes. Explain with examples. (b) Describe briefly the mechanism of nucleophilic addition to a carbonyl compound.
Q: 6
(a) What are aromatic hydrocarbons? How are they classified? (b) Write two reactions of carboxylic acids in which the hydrogen atom of carboxyl group is involved. (c) Give two reactions which are involved in preparation of urea fertilizer.
Q: 7
(a) Discuss the chemistry of chromyl chloride test. (b) Describe three factors affecting enzyme activity. (c) Detergents and live stock waste are water pollutants. Comment.
Chemistry-II Time: 20 minutes
(Objective Type)
2011 Marks: 17
Q: 1 Encircle the correct option. (17x1=17) (i) The element that forms amphoteric oxide is: (A) Li (B) Be (C) C (D) N (ii) Chile salt petre has the chemical formula: (A) NaNO3 (B) KNO3 (C) Na2B4O7 (D) Na2CO3.H2O (iii) Valence shell electronic configuration of the elements of group-III A is: (A) ns1, np2 (B) ns2, np3 (C) ns0, np3 (D) ns2, np1 (iv) The compound N2O causes disease: (A) cancer (B) sleeping sickness (C) hysterical laughter (D) tumor (v) The halogen that does not form oxyacids is: (A) fluorine (B) chlorine (C) bromine (D) iodine (vi) Coinage metals are present in the periodic table in group: (A) l-A (B) l-B (C) ll-A (D) ll-B (vii) The hybridization of Carbon atom in HCHO is: (A) sp (B) sp2 (C) sp3 (D) dsp (viii) Ethyl bromide reacts with aqueous KOH to produce: (A) Ethene (B) Ethane (C) Ethanol (D) Ethanoic acid (ix) The electrophile used for sulphonation of Benzene is: (A) SO2 (B) SO3+ (C) HSO4+ (D) H2SO4 (x) Order and Molecularity of SN2 reaction of alkyl halide is: (A) 1,2 (B) 2, 1 (C) 2, 2 (D)0,1 (xi) Percentage of ethanol in rectified spirit is: (A) 12% (B) 40% (C) 80% (D)95% (xii) Iodoform test is not given by the compound: (A) acetaldehyde (B) acetone (C)butanone (D) 3-pentanone (xiii) The reagent used to convert carboxylic acid directly to alkane is: (A) HI / P (B) NaBH4 (C) LiAlH3 (D) H2 / Ni (xiv) Degree of polymerization for a polymer of vinyl chloride is 1000. Molecular mass of the polymer is: (A) 63 (B) 630 (C) 63000 (D) 100 (xv) Calender stock is the stage of paper making where (A) Paper is stored (B) Thickness is reduced (C) Water is removed (D) Stock is reduced to 1% (xvi) Lithosphere is mainly made up of 11 elements, the element found in highest percentage is (A) sodium (B) calcium (C) carbon (D) silicon (xvii) Chlorofluorocarbons play an effective role in removing O3 in the (A) troposphere (B) stratosphere (C) polar region (D) equator
Time: 3:10 hours
(Subjective Type)
Marks: 68
Section-I (Short Questions) Q: 2 Write answers of any FIVE questions. (5x2=10) (i) Give two defects in Mendeleev’s Periodic table. (ii) Electrical conductance of metals in group I-A generally increases from top to bottom. Explain. (iii) How chlorine, produced in Diaphragm cell, is protected to react with hydroxide ions? (iv) Describe composition and use of chemical garden. (v) Boric acid can be converted to Borax and vice versa. Give reactions.
(vi) State procedure by which surface of stoneware is made less porous. (vii) Aluminum sheets are said to be corrosion free. Comment. (viii) Define substitutional alloy. Give an example. Q: 3 Write answers of any FIVE questions. (i) Justify that NO2 acts as an oxidizing agent. (ii) Prove that P2O5 is the dehydrating reagent. (iii) Fluorine shows peculiar behavior from other family members. Explain. (iv) What are Freons? Give their uses. (v) Discuss thermal cracking. (vi) Give examples of positional isomerism in Alkenes and Alkynes. (vii) Why is restricted rotation necessary to show the geometrical isomerism? (viii) Give two reactions which show that benzene is an unsaturated hydrocarbon.
(5x2=10)
Q: 4 Write answers of any FIVE questions. (5x2=10) (i) How common names of alkenes are derived? Give common names of CH2=CH2 and CH3-CH=CH2. (ii) Why ethane is more reactive than ethyne towards addition reactions? (iii) Complete the elimination reaction in two steps when a base B attacks on t-butyl bromide. (iv) Convert phenol to an alcohol. (v) Draw structures of : (a) isopropyl ether (b) phenyl ether (vi) How will you distinguish between 1-propanol and 2-propanol? (vii) Give reactions of ethyl alcohol with: (a) Na (b) PCI3. (viii) Prove by equations that CH3COOH is used to prepare: (a) acetyl chloride (b) acetic anhydride Q: 5 Write answers of any SEVEN questions. (i) What are disproportionation reactions? (ii) Define nucleophilic addition reaction with an example. (iii) How the oils are hardened? (iv) Define iodine number. (v) Classify polymers on the basis of monomers. (vi) Why nitrogen is important for plants? (vii) How digestion process is carried out in paper industry? (viii) Give important raw materials for manufacture of paper. (ix) Detergents are threat to aquatic life.
(7x2=14)
Section-II (Essay Type) Attempt any THREE questions from this section. Q: 6 (a) Discuss the position of hydrogen over IV-A group elements. (b) Draw a labeled diagram of diaphragm cell for preparation of sodium hydroxide.
(3x8=24)
Q: 7
(a) How organic compounds are classified? Give suitable examples of each type. (b) Using ethyl bromide, how would you prepare (i) n-Butane (ii) Ethene (iii) Ethyl alcohol (iv) Propanoic acid
Q: 8
(a) Describe how you could distinguish ethane, ethane and ethyne from one another by means of chemical reactions. (b) Describe Cannizzaro’s reaction with mechanism.
Q: 9
(a) Describe the structure of benzene on the basis of atomic orbital treatment. (b) Write down any three methods to prepare acetic acid. What is glacial acetic acid?
Q: 10 (a) Discuss the reaction of potassium dichromate with (i) Hydrogen sulphide (ii) Ferrous sulphate (iii) Potassium iodide (iv) Sodium chloride (b) Explain how pesticides are dangerous to human beings?
Chemistry-II Time: 20 minutes
2012
(Objective Type)
Marks: 17
Q: 1 Encircle the correct option. (17x1=17) (i) The oxides of non-metals are _____________. (ii) Which of the sulphates is not soluble in water? (iii) Which element is used in thermite process because of its activity? (iv) Catalyst used in contact process is _____________. (v) Strongest acid among the following is _____________. (vi) The strength of binding energy of transition elements depends upon _____________. (vii) A double bond consists of _____________. (viii) Vinyl Acetylene combines with HCI to form _____________. (ix) The conversion of n-hexane to Benzene by heating in presence of Pt is called _____________. (x) Bimolecular elimination reactions involve _____________. (xi) Which compound is more soluble in water? (xii) The carbon atom of carbonyl group is _____________. (xiii) Formalin is _____________. (xiv) The solution of which acid is used for seasoning of food? (xv) The fibre, made from acrylonitrile as monomer, is _____________. (xvi) Ammonium Nitrate fertilizer is not used for crop of _____________. (xvii) The main pollutant of leather tanneries in the waste water is due to the salt of _____________.
Time: 3:10 hours
(Subjective Type)
Marks: 68
Section-I (Short Questions) Q: 2 Write answers of any EIGHT questions. (8x2=16) (i) The second value of electron affinity of an element is usually shown with a positive sign. Explain with reasons. (ii) d and f block elements are called transition elements. Give reasons. (iii) Lithium is least reactive element of all alkali metals. Give reasons. (iv) What is role of Gypsum in industries? (v) How lime mortar is prepared? (vi) What is chemical garden? (vii) How does ortho boric acid reacts with: (i) Ethanol (ii) Sodium Carbonate (viii) Write down the structure of Carbon mono oxide. (ix) What are the commercial uses of halogens and their compounds? (x) Write the reaction of KMnO4 with: (i) H2S (ii) KOH (xi) Explain position isomerism with an example. (xii) There is no free rotation around a double bond and a free rotation along a single bond. Give reasons. Q: 3 Write answers of any EIGHT questions. (i) Describe ring test for the confirmation of the presence of Nitrate ions in the solution. (ii) How does HNO2 act as a reducing agent? (iii) Write the structural formula of the given compounds. (i) 2 ,2-Dimethyl Hexane (ii) 4-Iso-propyle heptane (iv) How does Ethyne reacts with: (i) Hydrogen (ii) Halogen acid
(8x2=16)
(v)
What is meant by the terms: (i) Aromatic (ii) Oxidation (vi) Why benzene is less reactive than alkenes although it has three pi-bonds in it? (vii) What products are formed when Ethyl magnesium bromide is treated with: (i) HCHO (ii) CO2 (viii) Define electrophile and nucleophile. Give one example of each. (ix) What is the use of Iodoform test to distinguish between Acetaldehyde and Formaldehyde? (x) How does Acetaldehyde react with the given reagents: (i) Dilute NaOH (ii) NH2OH (xi) Explain the term Condensation Polymerization. (xii) Write down the structural formula of cholesterol. Q: 4 Write answers of any SIX questions. (6x2=12) (i) Prepare diethyl ether by Williamson’s Synthesis. (ii) Why Ethyl alcohol is liquid while Ethyl chloride is gas at room temperature? (iii) Convert Ethanol into Isopropyl alcohol. (iv) Arrange the given compounds in order of increasing acid strength. H2O, C2H5OH, Phenol, Benzoic acid (v) Write down four uses of Acetic acid. (vi) What is meant by polypeptide and protein? (vii) Give percentage of Nitrogen in urea, ammonium nitrate, diammonium hydrogen phosphate and KNO3. (viii) What do you mean by Calcareous materials and Argillaceous materials used for manufacture of cement? (ix) How do Leather Tanneries pollute the water? Section-II (Essay Type) Attempt any THREE questions from this section. Q: 5 (a) What are periods? Describe different periods of periodic table. (b) How sodium metal is prepared commercially by Down’s Cell?
(3x8=24)
Q: 6
(a) What is meant by a functional group? Write names and classes of four oxygen containing functional groups. (b) What are nucleophilic substitution reactions? Discuss SN2 mechanism.
Q: 7
(a) What is Markownikov’s Rule? Give two examples. (b) Explain Cannizzaro’s Reaction.
Q: 8
(a) Prepare the compounds from Benzene in two steps. (i) m-chloronitrobenzene (ii) p-chloronitrobenzene (b) Give preparation of Carboxylic acid by the methods: (i) from Alkyl Nitriles (ii) from Grignard reagents (iii) by the hydrolysis of Esters (iv) by the oxidative cleavage of alkenes
Q: 9
(a) Give systematic names to the following complexes. (i) [Fe(CO)5] (ii) [Co(NH3)6]Cl3 (iii) Na3[CoF6] (iv) K2[Cu(CN)6] (b) How water is purified i.e., made potable by aeration and coagulation?
Chemistry-II Time: 20 minutes
(Objective Type)
2013 Marks: 17
Q: 1 Encircle the correct option. (17x1=17) (i) Choose the correct statement. (ii) Which element is deposited at cathode during electrolysis of brine? (iii) Which of the following elements is not present abundantly in earth crust? (iv) Which of the following species has the maximum number of unpaired electrons? (v) Bleaching powder may be produced by passing Cl2, over _____________. (vi) Group VI-B of transition elements contains _____________. (vii) Linear shape is associated with which set of hybrid orbitals? (viii) Synthetic rubber is made by polymerization of _____________. (ix) Which of the following acid can be used as a catalyst in Friedel Craft reaction? (x) Which one of the following is not a nucleophile? (xi) Which enzyme is not involved in fermentation of starch? (xii) Which of the following reagents will react with both aldehydes and Ketones? (xiii) Acetone reacts with HCN to form a cyanohydrin. It is an example of _____________. (xiv) Which of the following is not a fatly acid? (xv) Which of these polymers is an addition polymer? (xvi) During manufacturing process of cement, the temperature of decomposition zone goes up to ________. (xvii) The temperature range in non-rotating chamber in the incineration of industrial and hazardous waste process is _____________.
Time: 3:10 hours
(Subjective Type)
Marks: 68
Section-I (Short Questions) Q: 2 Write answers of any EIGHT questions. (8x2=16) (i) In what respects does hydrogen differ from halogens? Write down two dissimilarities. (ii) The first electron affinity of oxygen is negative, but the second is positive. Why? (iii) When sodium reacts with water, the hydrogen so evolved catches fire. Why? (iv) What are the advantages of Down’s cell for the preparation of sodium on commercial scale? (v) Describe "Ring Test” for the confirmation of the presence of nitrate ions in solution. (vi) How does HNO2 act as a reducing agent? (vii) Prove that P2O5 is the dehydrating reagent. (viii) Give two important applications of Helium. (ix) What are Chelates? (x) Give the mechanism of Ozonolysis of ethene. (xi) Why the aqueous solution of Na2CO3 is alkaline in nature? (xii) What is Baeyer’s test to check the presence of carbon carbon double bond? Q: 3 Write answers of any EIGHT questions. (i) Borate glazes are better than silicate glazes. Explain. (ii) Write a note on Borax Bead test. (iii) What is vital force theory? (iv) Write down names and possible structures of isomers of xylene. (v) What is elimination reaction? Give an example. (vi) What is leaving group? Give examples. (vii) How would you prepare Phenol by Dow’s process?
(8x2=16)
(viii) (ix) (x) (xi) (xii)
What is an amino acid? Draw its structure. Write down important uses of organic compounds in our daily life. What happens when benzene vapours are passed over heated V2O5? Write down structural formulas of sodium phenoxide and methoxy ethane. How would you convert acetic acid into methane and acetic anhydride?
Q: 4 Write answers of any SIX questions. (i) Justify that Cannizzaro’s reaction is a self-redox reaction. (ii) Define nucleophilic addition reaction with an example. (iii) Detergents are threat to aquatic life. Explain. (iv) What is iodoform test? Illustrate with an example. (v) Give Fehling’s solution test with an example. (vi) What are epoxy resins? Give their importance. (vii) Define Saponification number. (viii) Write a short note on micro-nutrients. (ix) Explain the importance of potassium fertilizer.
(6x2=12)
Section-II (Essay Type) Attempt any THREE questions from this section. (3x8=24) Q: 5 (a) Define Ionization energy? How does it differ along the period and down the group of periodic table? (b) What are four main differences of Be metal with other members of its group? Q: 6
(a) Define cracking and discuss its different types. (b) What is Aldol condensation? Write down its mechanism using as catalyst.
Q: 7
(a) Explain the addition reactions of ethene with examples. (b) Define elimination reactions and discuss the mechanism of E2 reaction.
Q: 8
(a) Describe with mechanism the Friedel Craft’s Acylation. (b) Write down reaction between acetic acid and ethanol in the presence of H2SO4 and also give mechanism of this reaction.
Q: 9
(a) Write down the rules for naming complex compounds. (b) Explain how pesticides are dangerous to human beings?
.
Chemistry-II Time: 20 minutes
(Objective Type)
2014 Marks: 17
Q: 1 Encircle the correct option. (17x1=17) (i) When CO2 is made to react with ethyl magnesium iodide followed by acid hydrolysis, the product formed is _____________. (ii) Carbolic acid is _____________. (iii) Cannizarro’s reaction is not given by _____________. (iv) Which of the following is not an amino acid? (v) Which of the following elements is not present in all proteins? (vi) Which three elements are needed for the healthy growth of plants? (vii) Ecosystem is a smaller unit of _____________. (viii) Which one is ionic hydride? (ix) Hydrogen resembles in properties with groups _____________. (x) Chile saltpeter has the chemical formula _____________. (xi) The chief ore of aluminium is _____________. (xii) Laughing gas is chemically _____________. (xiii) The anhydride of HCIO4 is _____________. (xiv) Co-ordination number of Pt in [PtCI(NO2)(NH3)4] is _____________. (xv) Which one is alcohol in the following? (xvi) Vinyl acetylene combines with HCI to form _____________. (xvii) Which compound is the most reactive?
Time: 3:10 hours
(Subjective Type)
Marks: 83
Section-I (Short Questions) Q: 2 Write answers of any EIGHT questions. (8x2=16) (i) The first electron affinity of oxygen is in negative figures but the second one is positive. Why? (ii) Diamond is a non-conductor and graphite is a good conductor. Give reason. (iii) How Portland cement is made? Why gypsum is added in the cement? (iv) How will you prepare Borax from “Colemanite” and “Boric acid”? (v) NO2 is strong oxidizing agent. Prove with the help of two chemical reactions. (vi) Give molecular structure of red phosphorous. How it is prepared from white phosphorous? (vii) What are Freons? Give its uses. (viii) CO2 is a gas while SiO2 is a solid at room temperature. Why? (ix) Write four properties of hydrogen fluoride. (x) Which elements and compounds can act as semiconductors? (xi) How XeF2 and XeF4 can be prepared? (xii) Give reactions of conc. H2SO4 with oxalic acid and formic acid. Q: 3 Write answers of any EIGHT questions. (i) What are interstitial compounds? (ii) Under what conditions aluminium corrodes? (iii) What is vital force theory? (iv) Define Metamerism. (v) What is Lindlar’s catalyst? Where it is used? (vi) Why π- bond is more reactive than σ- bond ? (vii) Why aldehydes are more reactive than ketones?
(8x2=16)
(viii) (ix) (x) (xi) (xii)
What is sodium nitroprusside test? Give preparation of Acetal. What is the degree of polymerization? Define Saponification number. Give the importance of Lipids.
Q: 4 Write answers of any SIX questions. (6x2=12) (i) Ethanol gives different products with Conc. H2SO4 under different conditions. Justify it. (ii) Iodoform test can be used to distinguish between methyl alcohol and ethyl alcohol. Justify it. (iii) Give different zones in rotary kiln and their temperature range. (iv) Give the mechanism of nitration of benzene. (v) What is Grignard’s reagent? How is it prepared? (vi) What are fertilizers? Why are they needed? (vii) Write down the major components of paper machine. (viii) How chlorofluorocarbons destroy the ozone layer? (ix) What is Biochemical Oxygen Demand (BOD)? Section-II (Essay Type) Attempt any THREE questions from this section. Q: 5 (a) Give the periodic trend of ionization energy and electron affinity in the periodic table. (b) Describe the manufacture of sodium by Down’s Cell.
(3x8=24)
Q: 6
(a) Explain isomerism and its various types with examples. (b) Define and distinguish with examples SN1 and SN2 reactions.
Q: 7
(a) Show by two reactions that ethene and ethyne are unsaturated. How can they be distinguished from each other? (b) What is glacial acetic acid? Write down any three methods to prepare acetic acid.
Q: 8
(a) Describe the structure of benzene on the basis of resonance method. (b) How will you convert? (i) Ethanol into Methane (ii) Ethanol into Ethanal (iii) Ethanol into Ethene (iv) Ethanol into Diethyl Ether
Q: 9
(a) What is galvanizing or anode coating? (b) What is smog? Explain the pollutants which are the main cause of photochemical smog. Section-III (Practical)
Attempt any THREE questions from this section. (3x5=15) Q: 10 a) (i) Write down any two confirmatory tests for acetate radical. (ii) Describe chromyl chloride test for chloride radical. b) (i) Write two confirmatory tests for Al+3 radical. (ii) Describe filter ash test. c) (i) Write any two confirmatory tests for Zn+2 radical. (ii) How will you perform Borax bead test? d) Write down the materials required, chemical equation and procedure for preparation of Aspirin. e) How will you detect sulphur and halogens in an organic compound?
Chemistry-II Time: 20 minutes
2015
(Objective Type)
Marks: 17
Q: 1 Encircle the correct option. (i) Which one is a disaccharide? (ii) Ammonium nitrate fertilizer is not used for which crop? (iii) Which is carcinogenic class of compounds? (iv) Which one is an incomplete period? (v) The Oxides of Beryllium are _____________. (vi) Which metal is used in thermite process because of its activity? (vii) The most electronegative element of group V-A is _____________. (viii) Alpha decay of the Radium gives _____________. (ix) Which of the following is a typical transition metal? (x) Which one is the heterocyclic compound of oxygen? (xi) Preparation of vegetable ghee involves _____________. (xii) Which compound is the most reactive one? (xiii) Which one of the following is not a nucleophile? (xiv) Which one is a dihydric alcohol? (xv) Which of the following will react with both aldehydes and ketones? (xvi) Ketones are prepared by the oxidation of _____________. (xvii) Which of the following is not a fatty acid?
(17x1=17)
Time: 3:10 hours
Marks: 83
(Subjective Type) Section-I (Short Questions)
Q: 2 Write answers of any EIGHT questions. (i) Give two similarities and two differences of hydrogen with I-A group elements. (ii) Why diamond is bad conductor of electricity but graphite is good conductor of electricity? (iii) Define each with one example. (a) Primary alkyl halide (b) Secondary alkyl halide. (iv) Give reactions of ethyl bromide with (a) CH3COONa (b) Zn+ HBr (v) Give names of any four steps involved in neutral sulphite semi chemical process. (vi) Write down reactions involved in first 24 hours during setting of cement. (vii) What is action of heat on orthophosphoric acid? (viii) Give reactions of P2O5 with (a) HNO3 (b) C2H5OH (ix) Convert acetic acid into acetone. (x) Define with examples (a) Tautomerism (b) Cracking of petroleum. (xi) How amino acid is synthesized? Give one method. (xii) What is vital force theory? Who rejected this theory and how?
(8x2=16)
Q: 3 Write answers of any EIGHT questions. (i) What are Clemmensen and Wolf Kishner’s reduction reactions? How they differ? (ii) What is difference between conjugated protein and derived protein? (iii) When double bond and triple bonds are present in a compound, how are they named? (iv) What are primary and secondary pollutants? Give examples.
(8x2=16)
(v) (vi) (vii) (viii) (ix) (x) (xi) (xii)
Write four uses of bleaching powder. What is Saponification number? How Gypsum is converted into plaster of Paris? What do you know about available chlorine? How wood spirit is prepared from water gas? Write down the structure of (a) Lactic acid (b) Tartaric acid. What is biochemical oxygen demand? How lime mortar is prepared?
Q: 4 Write answers of any SIX questions. (i) Give the structures and names of two condensed ring aromatic hydrocarbons. (ii) Give four uses of acetaldehyde. (iii) How will you distinguish between aldehydes and ketones? (iv) Why CO2 is acidic in character? (v) What happens when borax is treated with H2SO4? (vi) What are interstitial compounds? (vii) Give the uses of K2Cr2O7. (viii) What is Wurtz-Fitting reaction? (ix) What is haloform reaction?
(6x2=12)
Section-II (Essay Type) Attempt any THREE questions from this section. (3x8=24) Q: 5 (a) Explain the construction of Down’s cell. Give reactions taking place at cathode and anode. (b) How will you synthesize the following compounds starting from Ethyne? (i) Acetaldehyde (ii) Methylnitrile (iii) Ethane (iv) Acrylonitrile Q: 6
(a) Why is CO2 a gas at room temperature while SiO2 is a solid? Explain (b) What are aromatic hydrocarbons? How are they classified?
Q: 7
(a) Give four reactions of H2SO4 as an acid. (b) Write a note on SN1-reaction of alkyl halides.
Q: 8
(a) What are the commercial uses of halogens and their compounds? (b) How does phenol react with? (i) HNO3 (ii) H2SO4 (iii) H2 / Ni (iv) NaOH
Q: 9
(a) Define atomic orbital hybridization. Explain the structure of ethylene on the basis of hybridization. (b) What is Cannizarro’s reaction? Explain with mechanism. Section-III (Practical)
Attempt any THREE questions from this section. Q: 10 a) Write down the qualitative analysis of Zn+2 radical in a systematic manner. b) Write the qualitative analysis of Na+1 radical in a systematic manner. c) (i) Write the qualitative analysis of Cl-1 radical in a systematic manner. (ii) How ‘Palm test’ is performed? d) How will you detect ‘N’ and ‘S’ in an organic compound? e) Write the material required, equation and procedure for the preparation of Iodoform.
(3x5=15)
Answer Key Objective 2006 Question 7 (i) Potassium (ii) Nitrous Oxide (iii) Xenon (iv) Zinc (v) Lignite (vi) Ethane (vii) n-Heptane By treatment of Alkyl Chloride or Bromide (viii) with Sodium Iodide (ix) Oxidation (x) NCl3 Question 8 (i) Acidic (ii) Na3AlF6 (iii) Iodine (iv) Purple (v) Regular Hexagonal Planar (vi) Alcohols (vii) Methyl Alcohol (viii) Nucleophilic (ix) Glycogen (x) Chlorine
2007 Question 7 (i) Cs (ii) H2 (iii) N2O (iv) 6 (v) Metamerism (vi) CHCl3 (vii) 2 (viii)
95%
(ix) Saponification (x) Eyes Question 8 (i) Halogens (ii) Three Covalent bonds (iii) HF (iv) +3 (v) Liquid (vi) Halogentaion (vii) Primary Alcohols (viii) CH2(COOH)2 (ix) 82 (x) Pesticides
2008
2009
(i)
Basic
(i)
All of these
(ii)
Ba(OH)2
(ii)
Proteins
(iii)
H3BO3
(iii)
Al
(iv)
N2O
(iv)
NO2
(v)
F2
(v)
I2
(vi)
CrO2Cl2
(vi)
Trigonal bipyramidal
(vii)
2-Butene
(vii)
Amides
(viii)
Dilute Alkaline KMnO4
(viii)
Hydrogenolysis
(ix)
Friedel and Crafts Reaction
(ix)
Contains high percentage of Carbon
(x)
sp2
nd
(x)
2
Order
(xi)
SOCl2
(xi)
Ethanol
(xii)
Sec. Alcohol
(xii)
Dehydration
(xiii)
Cheese
(xiii)
Di-carboxylic Acid
(xiv)
Polystrene
(xiv)
Calculating molecular mass of polymers
(xv)
Manure
(xv)
Mg
(xvi)
Five days
(xvi)
5.6 km
(xvii)
Eyes
(xvii)
100 km
2010
2011
(i)
Urease
(i)
Be
(ii)
K2Cr2O7 + H2SO4
(ii)
NaNO3
(iii)
Fermentation
(iii)
ns2, np1
(iv)
Alkaline Phosphatase
(iv)
Hysterical Laughter
(v)
Cr, Mo, W
(v)
Fluorine
(vi)
sp2 hybridized
(vi)
I-B
(vii)
Propyne
(vii)
sp2
(viii)
AlCl3
(viii)
Ethene
(ix)
CH3COCH3
(ix)
SO3+
(x)
5 to 200 kg
(x)
2, 2
(xi)
Eyes
(xi)
95%
(xii)
5
(xii)
3-Pentanone
(xiii)
Basic
(xiii)
HI / P
(xiv)
H2O and CO2
(xiv)
63000
(xv)
Hard Board
(xv)
Thickness is reduced
(xvi)
N
(xvi)
Silicon
(xvii)
He
(xvii)
Stratosphere
2012
2013
(i)
Acidic
(i)
Metallic character increases down group
(ii)
Barium Sulphate
(ii)
H2
(iii)
Al
(iii)
Sodium
(iv)
V2O5
(iv)
O2
(v)
HCIO4
(v)
Calcium Hydroxide
(vi)
Number of unpaired electrons
(vi)
Cr, Mo, W
(vii)
One sigma and one pi bonds
(vii)
sp
(viii)
Chloroprene
(viii)
Chloroprene
(ix)
Aromatization
(ix)
AlCl3
(x)
Second order kinetics
(x)
BF3
(xi)
C2H5OH
(xi)
Urease
(xii)
sp2 -hybridized
(xii)
Grignard's reagent
(xiii)
40% solution of Formaldehyde in water
(xiii)
Nucleophilic addition
(xiv)
Acetic acid
(xiv)
Phthalic acid
(xv)
Acrylic fibre
(xv)
Polystyrene
(xvi)
Paddy rice
(xvi)
800 °C
(xvii)
Chromium (VI)
(xvii)
950-1300 °C
2014
2015
(i)
Propane
(i)
Sucrose
(ii)
Methanol
(ii)
Paddy rice
(iii)
Benzaldehyde
(iii)
Dioxins
(iv)
Alanine
(iv)
7th
(v)
Sulphur
(v)
Amphoteric
(vi)
N, Ca, P
(vi)
Aluminium
(vii)
Hydrosphere
(vii)
N
(viii)
NH3
(viii)
Radon
(ix)
I-A, V-A, VII-A elements
(ix)
Co
(x)
Na4B4O1
(x)
Furan
(xi)
Al2O3.2H2O
(xi)
Hydrogenation
(xii)
NO
(xii)
Ethene
(xiii)
CI2O7
(xiii)
BF3
(xiv)
2
(xiv)
Glycol
(xv)
CH3COOH
(xv)
Grignard’s reagent
(xvi)
Benzene
(xvi)
Secondary alcohol
(xvii)
Ethane
(xvii)
Phthalic acid
