1000+ Chemical Process MCQ for SSC GD [Solved]

1. Glass is
A. Mainly CaO
B. Subjected to galvanising
C. A super cooled liquid
D. All (A), (B) and (C)
Answer : C

2. Fat dispersed in water is exemplified by
A. Colloids
B. Gel
C. Butter
D. Emulsion
Answer : C

3. Transportation of 35% oleum during winter suffers from the problem of freezing, which can be overcome by the addition of small quantity of
A. Nitric acid
B. Hydrochloric acid
C. Methyl alcohol
D. Formic acid
Answer : A

4. Manufacture of phthalic anhydride uses __________ as a catalyst.
A. Ni
B. Cr
C. V₂O₅
D. Al₂O₃
Answer : C

5. Low purity oxygen is used for
A. L.D. steel making
B. Cutting and welding of metals
C. Medicinal purposes
D. Chemical oxidation processes
Answer : D

6. Fatty material used in soap making is
A. Fatty acid
B. Fatty alcohols
C. Tallow
D. Detergents
Answer : C

7. P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as
A. Bakelite
B. Neoprene
C. Teflon
D. Nylon-66
Answer : C

8. Pick out the wrong statement.
A. Fibrillation of fibre during paper manufacture is done to develop the strength in paper
B. Alkali consumption in digestion/cooking of bamboo is measured in terms of permanganate number
C. Bagasse fibre contains both lignin & cellulose
D. Presence of sodium sulphate in pulp makes the pulp bleachability poor
Answer : D

9. Naphthalene is removed from coke oven gas by
A. Adsorbing on palladium
B. Absorbing in ethanolamine
C. Scrubbing with wash oil
D. Passing it through electrostatic precipitator
Answer : C

10. 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

11. Main product in calcium carbide-water reaction is
A. Ca(OH)₂
B. C₂H₂
C. CO₂
D. CaCO₃
Answer : B

12. Potassium is kept & transported under
A. Water
B. Liquid ammonia
C. Kerosene oil
D. Alcohol
Answer : C

13. Thermosetting plastic materials
A. Can be repeatedly melted
B. Is useful for melt casting
C. Cannot be melted after forming
D. Is useful for spinning
Answer : C

14. Calcareous & argillaceous materials are used in the manufacture of
A. Lead
B. Cement
C. Carbon disulphide
D. None of these
Answer : B

15. For the hydrogenation of oils, __________ (i) __________ is commonly used as catalyst and __________ (ii) __________ is a catalyst poison.
A. (i) platinum (ii) sulphur
B. (i) palladium (ii) oxygen
C. (i) nickel (ii) sulphur
D. (i) nickel (ii) oxygen
Answer : C

16. Carborundum consists mainly of
A. Bauxite
B. Silicon carbide
C. Boron carbide
D. Calcium carbide
Answer : B

17. How much temperature is maintained during quicklime manufacture in the calcination zone of the vertical shaft kiln?
A. 500°C
B. 750°C
C. 1000°C
D. 1500°C
Answer : C

18. The gasification reaction represented by, C + H₂O = CO + H₂, is a/an __________ reaction.
A. Exothermic
B. Endothermic
C. Catalytic
D. Autocatalytic
Answer : B

19. __________ is obtained as a by-product in the manufacture of sodium hydroxide using brine.
A. Chlorine
B. Ammonium chloride
C. Sodium carbonate
D. Sodium bi-carbonate
Answer : A

20. Systemic insecticides
A. Are absorbed throughout the plant
B. Kill insects following external bodily contact
C. Are stomach poisons
D. Emit poisonous vapour
Answer : A

21. Yeast is used in the manufacture of
A. Penicillin
B. Antibiotics
C. Wine
D. Pasteurised milk
Answer : C

22. Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture.
A. CaO
B. MnO₂
C. ZnO
D. FeS
Answer : C

23. The main component of Pyrex glass is
A. Zinc
B. Lead
C. Boron
D. Selenium
Answer : B

24. Sodium carbonate (soda ash) is not used in the manufacture of
A. Fire extinguishers
B. Sugar
C. Baking powder
D. Detergents
Answer : D

25. __________ are used as corrosion inhibitor for iron & steel in aqueous solutions.
A. Phosphates
B. Chromates
C. Sulphates
D. Bi-carbonates
Answer : B

26. Phenolic antiseptics are added in the __________ soap.
A. Shaving
B. Medicated
C. Metallic
D. Transparent
Answer : B

27. BHC (Benzene hexachloride) is made by the chlorination of benzene
A. Which is an addition reaction
B. Which is a substitution reaction
C. In absolute dark
D. In presence of sunlight
Answer : A

28. The temperature in the calcium carbide furnace is __________ °C.
A. 200-300
B. 700-850
C. 2000-2200
D. 4000-4500
Answer : C

29. High temperature carbonisation of coal takes place at __________ °C.
A. 2000
B. 700
C. 1100
D. < 500
Answer : C

30. Washing soda is chemically represented by
A. Na₂CO₃
B. Na₂CO₃.H₂O
C. Na₂CO₃.10H₂O
D. NaHCO₃
Answer : C

31. Oxidation of SO₂ to SO₃ is favoured by
A. Low temperature and low pressure
B. Low temperature and high pressure
C. High temperature and low pressure
D. High temperature and high pressure
Answer : B

32. Solvay process is used for the manufacture of
A. Caustic soda
B. Soda ash
C. Caustic potash
D. Soda lime
Answer : B

33. Which of the following is an endothermic reaction?
A. Absorption of SO₃ in 98% H₂SO₄
B. C + H₂O = CO + H₂
C. Thermal dissociation of iron pyrites
D. Both (B) and (C)
Answer : D

34. Platinum is a versatile catalyst for many processes in chemical industries. It is highly prone to be poisoned by the presence of
A. Carbon
B. Arsenic
C. Lead
D. Sulphur
Answer : B

35. Fish contains about __________ percent oil.
A. 5
B. 10
C. 20
D. 35
Answer : C

36. Wax is a
A. Mixture of glycerides
B. Mixture of esters of polyhydric alcohols excepting glycerine
C. Liquid at room temperature
D. Mixture of glycerides of fatty acids
Answer : B

37. 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

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

39. The most widely used coagulant for removing suspended impurities from water is
A. Bleaching powder
B. Chlorine
C. Calcium sulphate
D. Alum
Answer : D

40. Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H₂O = Fe₃O₄ + 4H₂, is not practised, as it is
A. A slow reaction
B. A discontinuous reaction (requiring regeneration of iron by water gas intermittently)
C. Still in development stage (by employing fluidised bed technique)
D. All (A), (B) and (C)
Answer : D

41. __________ is a thermosetting plastic.
A. Polythene
B. Epoxy polymer
C. P.V.C.
D. Polystyrene
Answer : B

42. The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by
A. Electrolysis
B. Electrolytic reduction
C. Electrolytic oxidation
D. None of these
Answer : B

43. Which is a high grade pulp?
A. Rag pulp
B. Mechanical pulp
C. Sulphate pulp
D. Sulphite pulp
Answer : C

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

45. 'Hollander beater' machine used in the paper manufacturing plant does not accomplish the task of
A. Final rolling out of paper
B. Cutting of fibres
C. Hydration of fibres
D. Fibrillation of fibre
Answer : A

46. Lithophane is
A. Explosive
B. White lead
C. Filter aid
D. ZnS (white pigment)
Answer : D

47. Molecular weights of polymers are in the range of
A. 10² - 10²
B. 10⁵ - 10⁹
C. 10² - 10⁷
D. 10⁹ - 10¹¹
Answer : C

48. Process conditions in fermentator used for production of penicillin is
A. 25°C, 2 atm
B. 50°C, l0 atm
C. 30°C, 200 mm Hg (absolute)
D. 90°C, 45 atm
Answer : A

49. What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in an electrolytic cell?
A. Cl₂ & Na
B. Cl₂ & H₂
C. O₂ & H₂
D. Cl₂, H₂ & NaOH solution
Answer : D

50. Which of the following is a constituent of vinegar?
A. Around 10% alcohol
B. Around 1% acetic acid
C. Both (A) and (B)
D. Neither (A) nor (B)
Answer : C