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Chemistry mcqs test (1) For Entry Test
Chemistry Test:
1
Dr. Sajid Ali Talpur
1. The The bui build ldin ing g blo block ck of matte atterr is: is: a) electron b) atom c) element d) molecule 2. 12 kg of carb carbon on rep repre rese sent nt its its:: a) 1 mol b) 10 mol c) 100 mol d) 1000 mol 3. Whic Which h of the the foll follow owin ing g is is comp compou ound nd:: a) honey b) milk c) water d) A.O.T e) N.O.T 4. Urin Urinee and and blo blood od are are stu studi died ed und under er the the disciplines of_______Chemistry. a) organic b) inorganic c) physical d) bio 5. It tak takes es par partt in the the che chemi mica call reac reacti tion on:: a) electron b) proton c) neutron d) atom 6. NaCl NaCl repre represen sents ts one molec molecule ule of table table salt: salt: a) true b) false 7. The The expon exponent ential ial notati notation on form form of 100.50 100.50 is: a) 1 × 10-2 b) 100.50 × 102 c) 1005 × 10 2 d) 100.50 × 10 -2 8. What What is the mass mass of of a substa substanc ncee whose whose densit density y is 4 kg/ dm3 and volume 2 dm 3 a) 2 kg b) 4 kg c) 6 kg d) 8 kg
Chemistry Test:
2
Dr. Sajid Ali Talpur
9. H+ has: a) one electron b) one proton c) one electron and one proton d) one proton and one neutron e) one electron one proton and one neutron 10. It is a form form of of energy energy:: I. Light II. Sound III. sun a) 1 only b) 3 only c) 1 and 2 only d) 2 only 3 only e) 1, 2 and 3 11. Which Which of the following following are equal equal by mass: mass: a) proton and H + b) electron and Hc) neutron and H d) A.O.T 12. Regardin Regarding g the atom all are true true except: except: a) it is neutral b) it is destructible c) its mass lies in nucleus d) isotopes are due to variation in protons e) chemical properties are due to valence electrons 13. Which Which of the following following is the lightest lightest:: a) electron b) proton c) neutron d) H atom d) α-paticle
Chemistry Test:
3
Dr. Sajid Ali Talpur
Questions 14 – 18 Select from the terms below: a) boiling b) evaporation c) sublimation d) melting d) freezing e) N.O.T 14. conversio conversion n of solid into liquid liquid is called called 15. conversio conversion n of solid solid into gas gas 16. conversio conversion n of gas into into solid solid 17. conversio conversion n of liquid liquid into solid solid 18. it’s a coolin cooling g process process 19. Which Which of the following following is the heaviest heaviest:: a) electron b) proton c) neutron d) H atom d) α-paticle 20. 100.10 100.10 has signifi significant cant figures: figures: a) 3 b) 4 c) 5 d) 6 21. 1.9 will will be round rounded ed off off as: a) 2 b) 2.0 c) 1 d) 2.1 22. Water Water has high high boiling boiling point point due to: a) covalent bond b) ionic bond c) polar bond d) H-bond
Chemistry Test:
4
Dr. Sajid Ali Talpur
23. 23. Find Find the mis mis match match:: a) α-particle : proton b) β-particle β-particle : electron c) γ-particle : neutron d) α-particle : H atom e) α-particle : He nucleus 24. density density of water is: a) less than ice c) equal to ice
b) greater than ice d) all are possible
25. 1kg iron iron is not denser denser than than 1kg cotton cotton a) true b) false 26. Which one one has the the highest degree of polarity: polarity: a) H-Br b) H-I c) H-Cl d) H-F 27. 27. Log Log ab ab = a) log a + b c) log a /b
b) log a –b d) n log a
28. NaCl = 58.5 58.5 a.m.u; a.m.u; repres represents ents its: its: a) atomic mass b) molecular mass c) formula mass d) molar mass 29. What is the molecular molecular formula formula of a compound compound whose molecular mass is 28 and empirical formula CH: a) CH4 b) C2H2 c) C2H4 d) C2H6
Chemistry Test:
5
Dr. Sajid Ali Talpur
30. 24g of carbon contain contain _____atoms _____atoms of carbon: a) 6.02×1023 b) 2×6.02×1023 c) 12×6.02 × 10 23 d) 24×6.02 × 1023 31. What What is the empirica empiricall formula formula of ethane ethane C 2H6 a) CH b) CH2 c) CH3 d) N.O.T 32. Limiting Limiting reactan reactantt determines determines the amount amount of product to be formed: formed: a) true b)false 33. How many many particle particless are there in 36g 36g of magnesium: a) 6.02 × 1023 b) 9.03 × 1022 c) 90.3 × 1022 d) 12.04 × 1023 34. The reacti reaction on will go go forward forward if product/reactants(initial) product/reactants(initial) is: a) less than Kc b) greater than Kc c) equal to Kc d) All are possible 35. What What is the activation activation energy energy of a reaction reaction whose internal energy is 5 J and threshold energy 12 J a) 5 J b) 7 J c) 17 J d) 60 J 36. The equilib equilibrium rium of the the reaction reaction 2NO + O2 ↔ 2NO2 is not affected by: a) increase in temperature temperature b) increase in pressure pressure c) catalyst d) N.O.T
Chemistry Test:
6
Dr. Sajid Ali Talpur
Questions 37 – 46 Select from the terms below: A) Endo Endoth ther ermi micc rea react ctio ion n
b) Exot Exothe herm rmic ic reac reacti tion on
37. 37. Respi Respirat ration ion is: is: 38. 38. Bomb Bomb blas blastt is: is: 39. Decompo Decomposition sition react reaction ion is: 40. 40. Photo Photosy synth nthesi esiss is: 41. 41. Bond Bond format formation ion is: 42. 42. Bond Bond break breaking ing is: is: 43. 43. Freezi Freezing ng is: 44. 44. Evapo Evaporat ration ion is: is: 45. 45. Melt Meltin ing g is: 46. 46. Comb Combust ustion ion is: is: 47. Regardin Regarding g 2 g of hydrogen hydrogen gas all are true except: a) contains 6.02 × 10 23 molecules b) molecular mass mass c) one mole d) 22.4dm3 e) N.O.T
Chemistry Test:
7
Dr. Sajid Ali Talpur
48. All of the follo following wingss show red color color in the the acidic pH except: a) methyl orange b) litmus c) Phenolphthalein d) universal indicator 49. Which of the following following solution has high pH a) water + NaCl b) water + NaOH c) water + HCl d) water + milk 50. Oxidation number of all the elements in the free state is: a) 0 b) -1 c) + 1 d) -2
