Chemical Process MCQ Solved Paper for RRB JE

1. Polymethyl methacrylate (PMMA) is known as
A. Bakelite
B. Teflon
C. Perspex
D. Nylon-6
Answer : C

2. Main use of hydrazine is
A. As a rocket fuel
B. In water treatment
C. As a disinfectant
D. As fire retardant
Answer : A

3. Pick out the wrong statement pertaining to the soap manufacture.
A. Transparent soaps are made by cold process
B. Organic pigments are used as colouring materials in the soap manufacture
C. Both laundry as well as toilet soaps are manufactured by hot process
D. Colourless rosin is used in the manufacture of laundry soaps
Answer : A

4. A good quality coal should have
A. Low fusion point of ash
B. High ash content
C. High sulphur content
D. None of these
Answer : D

5. Ore concentration by froth floatation utilises the __________ of ore particles.
A. Density difference
B. Wetting characteristics
C. Terminal velocities
D. None of these
Answer : B

6. Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at __________ °C.
A. 15-30
B. 90-100
C. 250-300
D. < 0
Answer : A

7. Basic oxide is absent in __________ glass.
A. Flint
B. Pyrex
C. Quartz
D. All (A), (B) & (C)
Answer : C

8. CaSO4 . ½H₂O is known as
A. Blue vitriol
B. Plaster of Paris
C. Gypsum
D. Zeolite
Answer : B

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

10. Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its
A. Poor oxidation stability and high gum forming tendency
B. Greater tendency of decomposition at elevated temperature
C. Hydrolysis tendency in presence of water
D. All (A), (B) and (C)
Answer : D

11. The only commercial Fischer-Tropsch plant for producing liquid hydrocarbon fuel from coal is located at
A. SASOL (in South Africa)
B. Redcar (U.K.)
C. Los Angeles (U.S.A.)
D. Trombay (India)
Answer : A

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

13. Which oil is preferred for paint manufacture?
A. Drying oil
B. Non-drying oil
C. Semi-drying oil
D. Saturated oil
Answer : A

14. 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

15. Which of the following is not responsible for causing permanent hardness of water?
A. Ca(HCO₃)₂
B. CaCl₂
C. MgCl₂
D. None of these
Answer : A

16. 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

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

18. Bromine content in sea water may be around __________ ppm.
A. 70
B. 640
C. 1875
D. 2500
Answer : A

19. 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

20. Setting of plaster of Paris is accompanied with
A. Hydration
B. Dehydration
C. Hydrolysis
D. Loss of CO₂
Answer : A

21. Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine?
A. Na₂CO₃
B. NaHCO₃
C. H₂
D. None of these
Answer : C

22. Synthetic glycerine is produced from
A. Toluene
B. Phenol
C. Propylene
D. Naphthalene
Answer : C

23. Zeolite is a/an
A. Naturally occuring clay which is capable of exchanging cations
B. Abrasive material
C. Catalyst used in shift conversion
D. None of these
Answer : A

24. __________ is used as a catalyst in fat splitting.
A. ZnO
B. Ni
C. V₂O₅
D. FeO
Answer : A

25. Commercially ethylene is produced from naphtha by
A. Catalytic cracking
B. Catalytic dehydrogenation
C. Pyrolysis
D. Hydrocracking
Answer : D

26. In an integrated steel plant, NH3 present in coke oven gas is normally recovered as
A. (NH₄)₂SO₄
B. NH₄Cl
C. (NH₄)₂ NO₃
D. Liquid NH₃
Answer : A

27. Removal of dirt/soil by soaps or detergent does not involve the __________ of soil.
A. Emulsification
B. Dispersion
C. Precipitation
D. Wetting
Answer : C

28. The most economical pulp for the production of newsprint would be the __________ pulp.
A. Ground-wood
B. Sulphate
C. Sulphite
D. Semi-chemical
Answer : A

29. Graphite is a/an
A. Electrical insulator
B. Allotrope of carbon
C. Moderator used in nuclear reactor
D. Both (B) and (C)
Answer : D

30. Bisphenol A is produced by the condensation of acetone with
A. Formaldehyde
B. Ethyl alcohol
C. Diethyl ether
D. Phenol
Answer : D

31. L.D. converter is used in the production of
A. Pig iron
B. Steel
C. Copper
D. Zinc
Answer : B

32. The compressive strength of cement should not be less than about 110Kg/cm² after three days & not less than 170Kg/cm² after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about __________ cm²/gm.
A. 800
B. 1600
C. 4000
D. 8500
Answer : B

33. The process involved in converting rubber into a thin sheet or coating it on fabric is called
A. Extrusion
B. Mastication
C. Calendaring
D. Vulcanisation
Answer : C

34. 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

35. Bordeaux mixture is a/an
A. Fertiliser
B. Inorganic fungicide
C. Insecticide
D. Explosive
Answer : B

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

37. 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

38. Penicillin is separated from fermented broth by
A. Extraction with amyl or butyl acetate
B. Ternary Azeotropic distillation
C. Evaporator in calandria
D. Extractive distillation
Answer : A

39. Esterification reaction produces
A. Detergent
B. Vanaspati
C. Soap
D. Mercaptans
Answer : C

40. 10% oleum comprises of 10% free
A. SO₂
B. H₂SO₃
C. SO₃
D. H₂SO₄
Answer : C

41. Kaolin is a/an
A. Refractory material
B. Synthetic resin
C. Artificial abrasive
D. Blue pigment
Answer : A

42. Chloramines are used in water treatment for
A. Disinfection and control of taste & odour
B. Corrosion control
C. Removing turbidity
D. Control of bacteria
Answer : A

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

44. Starting raw material for the manufacture of Maleic anhydride is
A. n-butene
B. Benzene
C. Either (A) or (B)
D. Neither (A) nor (B)
Answer : C

45. Yellow glycerine is made into white, using
A. Activated carbon
B. Diatomaceous earth
C. Bauxite
D. Bentonite
Answer : A

46. Ethanol amine is produced using ammonia and
A. Ethyl benzene
B. Ethylene oxide
C. Ethanol
D. Ethane
Answer : B

47. High magnesia lime is added to hot sugar cane juice (during the manufacture of sugar) to
A. Flocculate the impurities
B. Facilitate fast filtration
C. Both (A) and (B)
D. Neither (A) nor (B)
Answer : C

48. Which of the following processes can remove both temporary as well as permanent hardness of water?
A. Filtration
B. Boiling
C. Distillation
D. None of these
Answer : C

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

50. Sodium bisulphite is used for __________ water.
A. Deaeration
B. Dechlorination
C. Both (A) & (B)
D. Neither (A) nor (B)
Answer : C