1000+ Chemical Process Multiple Choice Question Answer [Solved]

1. Which of the following is not required in the manufacture of soda ash by Solvay process?
A. Ammonia
B. Limestone
C. Nitric acid
D. None of these
Answer : C

2. Pick out the wrong statement.
A. High early strength cement are made from materials having high silica to lime ratio
B. The function of gypsum in cement is to enhance its initial setting rate
C. Acid resistant cements are known as silicate cement
D. Major component of greyish Portland cement is tricalcium silicate
Answer : A

3. Absorption of SO3 in 97% H2SO4 is
A. Exothermic
B. Endothermic
C. Not possible
D. None of these
Answer : A

4. Gelatine which is a nitrogenous organic protein is obtained by the hydrolysis of
A. Collagen
B. Tannin
C. Molasses
D. Carbohydrate
Answer : A

5. Oil produced by solvent extraction
A. Has low free fatty acid content
B. Is odourless
C. Both (A) & (B)
D. Neither (A) nor (B)
Answer : D

6. Concentration of hydrogen peroxide is done by
A. Crystallisation
B. Vacuum crystallisation
C. Atmospheric distillation
D. Dehydration
Answer : B

7. Maleic anhydride is produced by catalytic oxidation of
A. Toluene
B. Ethyl alcohol
C. Naphthalene
D. Benzene
Answer : D

8. Polycaprolactam is commercially known as
A. Nylon-6
B. Nylon-66
C. Dacron
D. Rayon
Answer : A

9. Bitterns is a/an
A. Unsaturated fat
B. Starting material for the production of iodine
C. By-product of chlor-alkali industry
D. None of these
Answer : D

10. Phthalic anhydride is used
A. In making PVC
B. As plasticisers
C. In insecticides manufacture
D. For making nylon-6
Answer : B

11. Temporary hardness of water can be removed by
A. Addition of alum (a coagulant)
B. Boiling
C. Filtration (through gravity sand filter)
D. Addition of lime
Answer : B

12. Catalyst used during the manufacture of 'Vanaspati Ghee' is
A. Zinc
B. Nickel
C. Platinum
D. Copper
Answer : B

13. __________ Nature of hypo (sodium thiosulphate) makes it useful in photography.
A. Oxidising
B. Reducing
C. Complex forming
D. Photochemical
Answer : C

14. Glycerine is recovered from lye by
A. Evaporation followed by vacuum distillation
B. Liquid extraction technique
C. Extractive distillation technique
D. None of these
Answer : A

15. Commonly used glass is known as the __________ glass.
A. Flint
B. Hard
C. Pyrex
D. Soda
Answer : D

16. In Kraft process of paper manufacture, white cooking liquor consists of caustic soda
A. Sodium sulphide & sodium carbonate
B. Sodium sulphite & sodium carbonate
C. Sodium sulphite & sodium sulphide
D. None of these
Answer : A

17. Which of the following is used as a coagulant in treating turbid water?
A. Chlorine
B. Ferric sulphate
C. Calcium sulphate
D. Activated carbon
Answer : B

18. Free alkali in a toilet soap is __________ that in a laundry shop.
A. Less than
B. More than
C. Same
D. None of these
Answer : A

19. Which of the following is an explosive?
A. Nitro-glycerine
B. Trinitrotoluene (TNT)
C. Cellulose nitrate
D. All (A), (B), and (C)
Answer : D

20. 20% oleum means that in 100 kg oleum, there are 20 kg of
A. SO₃ and 80kg of H₂SO₄
B. H₂SO₄ and 80kg of SO₃
C. SO₃ for each 100 kg of H₂SO₄
D. None of these
Answer : A

21. Sodium salt of higher molecular weight fatty acid is termed as the __________ soap.
A. Hard
B. Soft
C. Metallic
D. Lubricating
Answer : B

22. Anion exchanger is regenerated usually with
A. NaOH
B. H2SO4
C. Hydrazine
D. Alum solution
Answer : A

23. Pick out the wrong statement.
A. Low intensity explosives are also called propellants, whereas high intensity explosive are called detonators
B. Gun powder comprises of 75% salt petre, 15% charcoal and 10% sulphur
C. Lead azide is a popular military explosive
D. TNT is a hygroscopic explosive having very high melting point and is non-toxic to human being
Answer : D

24. Fusion of limestone and __________ produces high alumina cement.
A. Sand
B. Bauxite
C. Quicklime
D. Calcite
Answer : B

25. Wet chlorine gas produced during electrolysis of brine is dehydrated by
A. Spraying 66° Be H2SO4 counter current to the flow of the gas
B. Passing it through a bed of diatomaceous earth
C. Passing it through a bed of silica gel
D. None of these
Answer : A

26. Phenol formaldehyde
A. Employs addition polymerisation
B. Employs condensation polymerisation
C. Is a monomer
D. Is an abrasive material
Answer : B

27. Styrene is produced from ethyl benzene by the process of
A. Dehydrogenation
B. Oxidation
C. Alkylation
D. Dehydration
Answer : A

28. Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action of chlorine on
A. Slaked lime
B. Soda lime
C. Calcium perchlorate
D. None of these
Answer : A

29. Molasses is the starting material for the production of
A. Alcohol
B. Essential oil
C. Fatty acids
D. Massecuite
Answer : A

30. Parathion and Malathion are
A. Pesticides
B. Plasticisers for unsaturated polyesters
C. Pain-relieving drugs (analgesic)
D. Tranquilisers
Answer : A

31. 10% oleum comprises of 10% free
A. SO₂
B. H₂SO₃
C. SO₃
D. H₂SO₄
Answer : C

32. Pick out the wrong statement.
A. Pasteurisation of milk involves moderate heating followed by cooling
B. Bakeries and breweries make use of yeasts
C. Enzyme is a complex nitrogenous compound
D. Oils and fats are alkaloids
Answer : D

33. The catalyst used in the manufacture of DDT is
A. Alumina
B. Silica
C. 20% oleum
D. Aluminium chloride
Answer : C

34. Viscosity index improver (like polystyrene or polyisobutylene) is added to lubricant to
A. Reduce its viscosity
B. Increase its viscosity
C. Reduce the variation in its viscosity with temperature
D. Increase the variation in its viscosity with temperature
Answer : C

35. The process used for the manufacture of ethyl alcohol from molasses is
A. Distillation
B. Dehydration
C. Dehydrogenation
D. None of these
Answer : D

36. Which of the following is an ore of iron?
A. Galena
B. Chalcopyrite
C. Hematite
D. Bauxite
Answer : C

37. __________ process is used for the commercial production of nitric acid by the catalytic oxidation of ammonia.
A. Solvay
B. Ostwald's
C. Haber's
D. None of these
Answer : B

38. Chemical name of Grignard reagent is
A. Sodium thiosulphate
B. Ethyl magnesium chloride
C. Sodium sulphite
D. Sodium bicarbonate
Answer : B

39. Bleaching of paper pulp is done with
A. Activated clay
B. Bromine
C. Chlorine or chlorine dioxide
D. Magnesium sulphite
Answer : C

40. Vinyl chloride (CH2 = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of
A. 4 kgf/cm² & 500°C
B. 10 kgf/cm² & 1000°C
C. 40 kg/cm² & 200°C
D. 100 kgf/cm² & 500°C
Answer : A

41. Celluloid is chemically
A. Cellulose acetate
B. Regenerated cellulose
C. Cellulose nitrate
D. Cellulose acetate butyrate
Answer : C

42. Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like
A. High cost
B. Fragile nature
C. Easy poisoning tendency
D. All (A), (B) and (C)
Answer : D

43. Concentration of NaOH solution produced by mercury electrolytic cell is about __________ percent.
A. 10
B. 25
C. 50
D. 98
Answer : C

44. Resistance to fusion of the refractory under a steady rising temperature condition is called
A. Spalling
B. Refractoriness
C. Both (A) & (B)
D. Neither (A) nor (B)
Answer : B

45. Nickel is not used as a catalyst in the
A. Fischer-Tropsch process
B. Shift conversion
C. Hydrogenation of oil
D. Ostwald's process of HNO3 manufacture
Answer : D

46. Main constituent of limestone is
A. CaCO₃
B. MgCO₃
C. Na₂CO₃
D. CaSO₄
Answer : A

47. Carbon tetrachloride (CCl₄) is the starting raw material for the manufacture of
A. Trichloroethylene
B. Perchloroethylene
C. Parathion
D. Methanol
Answer : B

48. Styrene is produced from ethyl benzene by the process of
A. Dehydrogenation
B. Oxidation
C. Alkylation
D. Dehydration
Answer : A

49. Ultimate analysis of coal determines its __________ content.
A. Carbon, hydrogen, nitrogen & sulphur
B. Carbon, ash, sulphur & nitrogen
C. Carbon, sulphur, volatile matter & ash
D. Carbon, volatile matter, ash & moisture
Answer : C

50. Hydrogenation of oil takes place in a/an __________ reactor.
A. Autothermal
B. Trickle bed
C. Plug flow
D. None of these
Answer : B