chemical engineering chemical process MCQs – Page 4

Practise multiple-choice questions from chemical engineering chemical process for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering chemical process Mcqs
61. Carboxymethyl cellulose (CMC) is added in detergents to_________________?
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A. Prevent redeposition of soil on cleaned surface

B. Inhibit corrosion in washing machines made of aluminium

C. None of these

D. Act as optical brightening agent

62. Nylon-6 as compared to Nylon-66 is having higher___________________?
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A. Abrasion/resistance

B. Hardness

C. None of these

D. Melting point

63. Presence of carbonaceous matter in the sewage____________________?
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A. Reduces sulphate ions to sulphides causing obnoxious smell

B. Increases the quantity of chlorine used for its purification

C. Causes reduction in its dissolved oxygen content thereby endangering the life of aquatic

D. All A, B. and C.

E. atures

64. Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is ______________ percent?
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A. 95

B. 80

C. 10

D. 50
65. Nitrile rubber is produced by the polymerisation of__________________?
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A. Isobutylene and isoprene

B. Acrylonitrile and butadiene

C. None of these

D. Acrylonitrile and styrene

66. Which of the following impurities in feed water for high pressure boiler is the most detrimental ?
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A. Dissolved salt

B. Suspended salt

C. Silica

D. Dissolved oxygen

67. Which of the following is an explosive ?
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A. All A , B., and C.

B. Trinitrotoluene (TNT)

C. Nitro-glycerine

D. Cellulose nitrate

68. Reaction of calcium carbide with water produces a gas, which is used_________________?
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A. As an illuminant

B. For metal cutting/welding

C. Both A. & B.

D. Neither A. nor B.

69. Which one of the following is not an elastomer ?
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A. Neoprene

B. Nitrile-butadiene

C. Polyisoprene

D. None of these
70. 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?
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A. 1600

B. 4000

C. 8500

D. 800

71. Low temperature carbonisation of coal takes place at _______________ C ?
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A. 300

B. 1100

C. 700

D. 900

72. Which of the following is not present in bagasse fibre ?
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A. None of these

B. Pentogens

C. Cellulose

D. Lignin

73. Plasticisers are added to synthetic plastics to____________________?
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A. Improve workability during fabrication

B. Impart flexibility

C. Develop new improved properties not present in the original resins

D. All A, B. and C.
74. The manufacture of Kraft pulp is done by a/an _________________ process?
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A. Alkaline

B. None of these

C. Acidic

D. Neutral

75. Concentration of NaOH solution produced by diaphragm electrolytic cell is about _______________ percent?
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A. 25

B. 10

C. 98

D. 50

76. Catalytic oxidation of toluene produces____________________?
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A. Styrene

B. Tri-nitro-toluene

C. Phenol

D. Benzene

77. Phenol formaldehyde is produced by condensation polymerisation. It is also known as_____________________?
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A. Teflon

B. Bakelite

C. Polyester

D. Nylon-66

78. Carborundum consists mainly of_________________?
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A. Boron carbide

B. Silicon carbide

C. Calcium carbide

D. Bauxite

79. Which of the following processes can remove both temporary as well as permanent hardness of water ?
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A. Boiling

B. Distillation

C. Filtration

D. None of these

80. In an integrated steel plant, NH3 present in coke oven gas is normally recovered as_________________?
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A. (NH4)2SO4

B. NH4Cl

C. (NH4)2 NO3

D. Liquid NH3