Chemical Process MCQ Solved Paper for RRB ALP

1. Nitrogen is an essential component of
A. Mineral salts
B. Carbohydrates
C. Fats
D. Proteins
Answer : D

2. Which of the following is not a product of coal tar distillation?
A. Anthracene
B. Creosote oil
C. Carbolic oil
D. None of these
Answer : D

3. Glauber's salt is chemically represented by
A. Na₂SO₄.10H₂O
B. CaCl(OCl)
C. CaSO₄.H₂O
D. (NH₄)₂SO₄
Answer : A

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

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

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

7. 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

8. Phosphoric acid is prepared from
A. Cryolite
B. Chalcopyrite
C. Rock phosphate
D. None of these
Answer : C

9. 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

10. Calcination of limestone is not done in a __________ kiln for producing lime.
A. Vertical shaft
B. Rotary
C. Fluidised bed
D. Fixed bed
Answer : D

11. Sucrose is a disaccharide consisting of
A. Glucose and glucose
B. Glucose and fructose
C. Glucose and galactose
D. Fructose and galactose
Answer : B

12. __________ is an ore concentrating metallurgical process involving a chemical change.
A. Electromagnetic separation
B. Froth floatation
C. Roasting
D. None of these
Answer : C

13. Refractory bricks burnt at very high temperature have got
A. Greater resistance to corrosion by slags
B. Less resistance to corrosion by slags
C. High spalling tendency
D. None of these
Answer : A

14. 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

15. Glauber's salt is chemically
A. Calcium sulphate
B. Potassium sulphate
C. Potassium chlorate
D. None of these
Answer : D

16. Saponification value/number of an oil or fat is a measure of its
A. Fatty acid content
B. Degree of unsaturation of the fatty acids present in it
C. Average molecular weight
D. Insoluble fatty acid content
Answer : C

17. 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

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

19. Dichloro diphenyl __________ is the full form of DDT (an insecticide).
A. Tetrachloroethane
B. Trichloroethane
C. Tetrachloromethane
D. Trichloromethane
Answer : B

20. Refractory bricks having high thermal conductivity is desirable, when it is to be used in the
A. L.D. converter
B. Blast furnace
C. Rotary kiln
D. Recuperator
Answer : D

21. Varnish does not contain
A. Thinner
B. Pigment
C. Both (A) & (B)
D. Neither (A) nor (B)
Answer : B

22. Yellow phosphorus is transported under
A. Air
B. Water
C. Nitrogen
D. Helium
Answer : B

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

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

25. Salt cake is chemically represented by
A. Na₂SO₄
B. CaSO₄. ½H₂O
C. MgSO₄
D. BaSO₄
Answer : A

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

27. Pick out the correct statement.
A. A fat is converted into oil by its hydrogenation
B. There is no difference between a fat and an oil so far as its physical properties are concerned
C. All vegetable oils except coconut oil, contains fatty acids having more than sixteen carbon atoms
D. Vegetable oils are classified as drying, non-drying and semi drying oils depending upon their fatty acids content
Answer : C

28. Argon is the third largest constituent of air (followed by N₂ & O₂). Its percentage by volume in air is
A. 0.14
B. 0.34
C. 0.94
D. 1.4
Answer : C

29. SO2 is bubbled through hot sugar cane juice to
A. Act as an acidifying agent
B. Increase its concentration
C. Increase the amount of molasses
D. Increase the crystal size
Answer : A

30. Main constituent of dolomite is
A. CaCO₃
B. MgCO₃
C. K₂CO₃
D. Na₂CO₃
Answer : B

31. Alum [Al₂(SO₄)₃] is used as a coagulant in water treatment to remove
A. Colour
B. Turbidity
C. Bacteria
D. All (A), (B) and (C)
Answer : D

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

33. Fermentation is adversely affected by the
A. Presence of air
B. Absence of air
C. High concentration
D. Presence of ammonium salts
Answer : C

34. With increase in temperature, the equilibrium constant at constant pressure (Kp) for oxidation of sulphur dioxide
A. Increases
B. Increases linearly
C. Decreases
D. Decreases linearly
Answer : C

35. Phthalic anhydride is produced by the oxidation of
A. Naphthalene
B. Benzene
C. Toluene
D. Aniline
Answer : B

36. Gypsum is chemically
A. Calcium chloride
B. Potassium sulphate
C. Sodium sulphate
D. Calcium sulphate
Answer : D

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

38. Production of alcohol by fermentation of molasses is a/an __________ process.
A. Anaerobic
B. Aerobic
C. Endothermic
D. Both (B) and (C)
Answer : B

39. 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

40. Fermentation of molasses to produce ethyl alcohol is done at __________ °C.
A. 20 - 30
B. < - 5
C. 100 - 150
D. 250 - 300
Answer : A

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

42. Dacron is a/an
A. Polyester
B. Unsaturated polyester
C. Polyamide
D. Inorganic polymer
Answer : A

43. The biochemical treatment applied to sewage effluents is a process of
A. Dehydration
B. Reduction
C. Oxidation
D. Polymerisation
Answer : C

44. In contact process, SO₃ is absorbed in 97% H₂SO₄ and not in water, because
A. SO₃ gas is sparingly soluble in water
B. Water forms an acid mist, which is difficult to absorb
C. The purity of acid is affected
D. Scale formation in the absorber is to be avoided
Answer : B

45. 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

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

47. Neoprene is chemically known as
A. Polybutadiene
B. Styrene butadiene rubber (SBR)
C. Polyurethane
D. Polychlorophrene
Answer : D

48. Starting raw material for the manufacture of alum is
A. Alumina
B. Gypsum
C. Bauxite
D. Ammonium bicarbonate
Answer : C

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

50. The main use of HCl is in the
A. Drilling of petroleum wells and pickling of steel sheets
B. Manufacture of cationic detergent
C. Treatment of spent fuel of nuclear reactor
D. None of these
Answer : A