Chemical Process MCQ Solved Paper for IBPS PO

1. H2S is scrubbed from refinery gases by absorption using
A. Dilute H₂SO₄
B. Ethanol amine
C. Chilled water
D. Tri-butyl phosphate
Answer : B

2. Cement setting under water employs a/an __________ process.
A. Hydration
B. Decomposition
C. Oxidation
D. Reduction
Answer : A

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

4. Sulphuric acid completely saturated with sulphur trioxide is called
A. Concentrated sulphuric acid
B. Oleum
C. Sulphurous acid
D. Dilute sulphuric acid
Answer : A

5. Which of the following is not an abrasive material?
A. Bakelite
B. Pumice
C. Corundum
D. Carborundum
Answer : A

6. Percentage of alcohol in beer may be around __________ percent.
A. 2-8
B. 18-23
C. 27-32
D. 1-4
Answer : A

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

8. 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

9. Chrome tanning and vegetable tanning are done for
A. Light & heavy leather respectively
B. Heavy & light leather respectively
C. Both light & heavy leather
D. Neither light nor heavy leather
Answer : A

10. 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

11. Rancidity of the fatty oil can be reduced by its
A. Decoloration
B. Hydrogenation
C. Oxidation
D. Purification
Answer : B

12. Sea weeds are an important source of
A. Fluorine
B. Chlorine
C. Bromine
D. Iodine
Answer : D

13. 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

14. Permanent hardness of water can be removed by
A. Boiling
B. Adding Ca(OH)₂
C. Boiling it with Na₂CO₃
D. None of these
Answer : C

15. Sizing material is incorporated in paper to
A. Impart resistance to penetration by liquids
B. Increase its thickness
C. Increase its flexibility & opacity
D. Increase its brightness
Answer : A

16. Which of the following is an organometallic compound?
A. Isopropyl alcohol
B. Tetra-ethyl lead
C. Zeolite
D. Cumene
Answer : B

17. Which is the main reducing agent during production of iron from iron ore in a blast furnace?
A. C
B. CO
C. CO₂
D. H₂
Answer : B

18. An oil is converted into fat by its
A. Hydrogenation
B. Hydrolysis
C. Hydrocracking
D. Hydration
Answer : A

19. Use of water having dissolved oxygen in boilers promotes
A. Corrosion
B. Sequestration
C. Scale formation
D. None of these
Answer : A

20. Which is the most efficient absorbent for SO₃ out of the following?
A. 20% oleum
B. 65% oleum
C. 78% H₂SO₄
D. 98% H₂SO₄
Answer : D

21. CaO is called
A. Quick lime
B. Slaked lime
C. Limestone
D. Calcite
Answer : A

22. Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc?
A. Sodium silicate
B. Sodium borate
C. Sodium tripolyphosphate (STPP)
D. Caustic soda
Answer : B

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

24. Soap cannot be used with hard water, because
A. Hard water contains sulphate
B. They form insoluble calcium soaps which precipitate
C. They attract back the removed dirt
D. None of these
Answer : B

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

26. 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

27. 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

28. Permanent hardness of water is due to the presence of calcium & magnesium
A. Bi-carbonates
B. Sulphates & chlorides
C. Carbonate
D. None of these
Answer : B

29. Pure rectified spirit contains about __________ percent alcohol.
A. 45
B. 70
C. 95
D. 99.5
Answer : C

30. Le-Blanc process is a primitive process for the manufacture of
A. Caustic soda
B. Soda ash
C. Bromine from sea water
D. Hydrochloric acid
Answer : B

31. 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

32. Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda?
A. High cost of mercury
B. High specific gravity of mercury
C. Non-availability of high purity mercury
D. Pollution of water stream by mercury
Answer : D

33. Carbon disulphide is mainly used in the production of
A. Viscose rayon
B. Corundum
C. Plasticiser for unsaturated polyester
D. Paints
Answer : A

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

35. 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

36. Poly Vinyl Chloride (P.V.C.) is a __________ material.
A. Thermosetting
B. Thermoplastic
C. Fibrous
D. Chemically active
Answer : B

37. Enamels
A. Give good glossy finish
B. Are same as varnish
C. Are prepared from non-drying oil
D. Do not contain pigment
Answer : A

38. 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

39. More than 100 percent of __________ is present in oleum.
A. SO₃
B. H₂SO₄
C. H₂SO₃
D. SO₂
Answer : B

40. Fire clay is __________ refractory material.
A. A basic
B. An acidic
C. A neutral
D. Not a
Answer : B

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

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

43. __________ is used as a flux in the smelting of copper ore like chalcopyrite.
A. Coke breeze
B. Lime powder
C. Silica/quartz
D. Dolomite
Answer : C

44. Presence of H₂S in raw water (to be chlorinated) results in the
A. Reduced softening capacity of zeolite
B. Increased dosage of chlorine to provide a disinfecting residual in the water
C. Easy removal of its hardness
D. None of these
Answer : B

45. 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

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

47. Ethyl alcohol cannot be produced
A. From waste sulphite substrate of paper mills
B. By Esterification and hydrolysis of ethylene
C. From molasses
D. None of these
Answer : D

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

49. Contact process of sulphuric acid manufacture
A. Yields acid of higher concentration than chamber process
B. Yields acids of lower concentration than chamber process
C. Is obsolete
D. Eliminates absorber
Answer : A

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