1000+ Chemical Process MCQ for RBI Assistant [Solved]

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

2. Presence of carbonaceous matter in the sewage
A. Causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures
B. Reduces sulphate ions to sulphides causing obnoxious smell
C. Increases the quantity of chlorine used for its purification
D. All (A), (B) and (C)
Answer : D

3. The enzyme which converts starch into the disaccharides maltose is
A. Diastase
B. Maltase
C. Yeast
D. None of these
Answer : A

4. CaCl(OCl) is the chemical formula of
A. Hypo
B. Bleaching powder
C. Plaster of Paris
D. Aqua regia
Answer : B

5. 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

6. Low temperature carbonisation of coal takes place at __________ °C.
A. 300
B. 1100
C. 700
D. 900
Answer : C

7. Drinking (potable) water treatment does not involve
A. Coagulation
B. Sedimentation
C. Softening
D. Disinfection
Answer : C

8. 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

9. Glycerine is not used in the
A. Manufacture of explosive
B. Conditioning and humidification of tobacco
C. Manufacture of pharmaceuticals
D. None of these
Answer : D

10. Which glass is usually used in optical work?
A. Lead glass
B. High silica (borosilicate) glass
C. Photo-sensitive glass
D. Fibre glass
Answer : C

11. Adipic acid is an intermediate in the manufacture of
A. Perspex
B. Nylon-66
C. Polystyrene
D. Bakelite
Answer : B

12. Lubricating greases are a mixture of
A. Mineral oil, soap and additives
B. Mineral oil and metallic soap
C. Mineral oil and fatty oil
D. Fatty oil and metallic soap
Answer : A

13. Hydrophilic group of a soap or detergent solution is
A. Water hating
B. Soil loving
C. Water loving
D. None of these
Answer : C

14. The yield of tar from high temperature carbonisation of dry coal is about __________ percent.
A. 3
B. 12
C. 22
D. 0.3
Answer : A

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

16. Coagulant is used __________ filtration.
A. Before
B. After
C. During
D. To avoid
Answer : A

17. The most commonly used substance to speed up the sedimentation of sewage is
A. Lime
B. Sulphuric acid
C. Chlorine
D. Sodium bisulphite
Answer : A

18. Claude process of gas liquefaction employs
A. Merely compression of gas beyond its critical pressure
B. Joule-Thomson expansion cooling
C. Heat exchange with colder stream
D. Adiabatic expansion against a piston or in a turbine
Answer : D

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

20. Which of the following contains least amount of N₂?
A. Coke oven gas
B. Blast furnace gas
C. Producer gas
D. Water gas (blue gas)
Answer : A

21. __________ of rubber decreases after its vulcanisation.
A. Resistance to the action of organic solvent
B. Tackiness
C. Maximum service temperature
D. Tensile strength
Answer : B

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

23. The drug used in contraceptives is
A. Sulfadiazine
B. Mestranol
C. Methyl salicylate
D. Penicillin
Answer : B

24. In the production of soda ash by Solvay process, the by-product is
A. CaCl₂
B. NH₄Cl
C. NH₃
D. NaOH
Answer : A

25. Exothermic neutralisation reaction between caustic soda and dodecylbenzene sulfonic acid produces sodium dodecylbenzene sulphate, which is a/an
A. Explosive
B. Soap
C. Detergent
D. Analgesic drug
Answer : C

26. Nitric acid is not used in the manufacture of
A. Detergents
B. Fertilisers
C. Aqua regia
D. Explosives
Answer : A

27. __________ is the major constituent of the Portland cement.
A. Calcium carbonate
B. Calcium oxide
C. Tricalcium silicate
D. Calcium sulphate
Answer : C

28. Tall oil obtained as a by-product from the black liquor recovery is
A. A black, sticky & viscous liquid
B. Used in the manufacture of greases, emulsions & soaps
C. Composed mainly of rosin & fatty acids
D. All (A), (B) & (C)
Answer : D

29. Chlorine gas is produced by the electrolysis of brine (NaCl solution with solid NaCl make up) in mercury electrolytic cell. Which of the following is the anodic reaction?
A. Oxidation of Na⁺ ions
B. Oxidation of Cl^- ions
C. Reduction of Na⁺ ions
D. Reduction of Cl^- ions
Answer : B

30. Which of the following is a detergent?
A. Benzene hexachloride
B. Alkyl benzene sulphonate
C. Polytetrafluoroethylene
D. Cellulose nitrate
Answer : B

31. __________ 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

32. Fermentator temperature during production of alcohol from molasses is around __________ °C.
A. 5
B. 30
C. 130
D. 300
Answer : B

33. Which of the following is used as a coagulant in water treatment?
A. Chloramine
B. Chlorine
C. Ferrous sulphate
D. Hydrogen peroxide
Answer : C

34. The catalyst used in shift converter is
A. Nickel
B. Vanadium
C. Silica gel
D. Alumina
Answer : A

35. Vegetable oils and fats basically differ in their
A. Density ranges
B. Physical state
C. Chemical composition
D. Chemical properties
Answer : B

36. Chemical name of soda ash is
A. Sodium bicarbonate
B. Sodium thiosulphate
C. Potassium carbonate
D. None of these
Answer : D

37. Which of the following is not a pyrite ore?
A. Celestite
B. Galena
C. Gypsum
D. Siderite
Answer : D

38. A mineral is termed as 'ore', if
A. A metal can be economically extracted from it
B. It contains ? 40% metal
C. The metal present in it is costly
D. All (A), (B) and (C)
Answer : A

39. Type of glass used in optical work is the __________ glass.
A. Soda-lime
B. Fibre
C. Lead
D. Borosilicate
Answer : C

40. Sea water contains about __________ ppm of bromine.
A. 5
B. 70
C. 500
D. 1700
Answer : B

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

42. 10% oleum comprises of 10% free
A. SO₂
B. H₂SO₃
C. SO₃
D. H₂SO₄
Answer : C

43. 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

44. __________ glass is used for the manufacture of optical glass.
A. Pyrex
B. Soda
C. Flint
D. Crooke's
Answer : C

45. Which one of the following is not likely to be a constituent of vegetable oils?
A. Citric acid
B. Oleic acid
C. Stearic acid
D. Glycerol
Answer : A

46. Sucrose content in cane sugar may be around __________ percent.
A. 50
B. 70
C. 95
D. 80
Answer : C

47. Fourdrinier machine is used in the manufacture of
A. Sugar
B. Paper
C. Alcohol from molasses
D. Phenol formaldehyde
Answer : B

48. Pick out the wrong statement pertaining to nitric acid.
A. About 90% of nitric acid is manufactured by Ostwald's process
B. It is a strong mono basic acid which reacts with almost all the metals except noble metals
C. Yellow color of impure nitric acid is because of dissolved oxides of nitrogen (mainly NO2)
D. Arc process of nitric acid manufacture is economical as compared to Ostwald's process
Answer : D

49. Styrene (a monomer for the production of polystyrene) is commercially produced by
A. Catalytic dehydrogenation of ethyl benzene
B. Dehydration of ethyl alcohol followed by hydrogenation
C. Reacting ethylene oxide with acetaldehyde
D. Fermentation of starch
Answer : A

50. Hydrolysis of sugar is called
A. Hydration
B. Inversion
C. Esterification
D. None of these
Answer : B