chemical engineering MCQs – Page 55

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 Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs
1081. Which of the following impurities in feed water for high pressure boiler is the most detrimental ?
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A. Suspended salt

B. Dissolved oxygen

C. Dissolved salt

D. Silica
1082. Sulphur addition in soap is done to _____________________?
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A. Improve the soap texture

B. Increase its cleansing action

C. Cure pimples & dandruff

D. Fasten lather formation

1083. Permanent hardness of water can be removed by____________________?
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A. Passing it through cation & anion exchangers

B. All (A), B. and (C)

C. Adding alum

D. Simply boiling

1084. Celluloid is chemically___________________?
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A. Regenerated cellulose

B. Cellulose acetate

C. Cellulose acetate butyrate

D. Cellulose nitrate
1085. Naphthalene is removed from coke oven gas by ________________________?
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A. Scrubbing with wash oil

B. Passing it through electrostatic precipitator

C. Absorbing in ethanolamine

D. Adsorbing on palladium

1086. Haemoglobin is a/an____________________?
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A. Enzyme

B. Protein

C. Amino acid

D. Biological catalyst

1087. Cation exchanger is regenerated usually with_________________________?
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A. H2SO4

B. Hydrazine

C. Alum solution

D. NaOH

1088. The amount of benzene present in pure Benzol is about _______________ percent ?
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A. 70

B. 30

C. 90

D. 50

1089. Commercially ethylene is produced from naphtha by ______________________?
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A. Pyrolysis

B. Hydrocracking

C. Catalytic dehydrogenation

D. Catalytic cracking

1090. Starting material for the production of styrene butadiene rubber (SBR) is________________?
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A. Ethyl alcohol

B. Ethylene

C. Both A. & B.

D. Neither A. nor B.

1091. Shrinkage volume in cement setting does not depend upon the _____________________?
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A. Water to cement ratio

B. Drying period

C. Ambient temperature fluctuation

D. Sand to cement ratio
1092. Laboratory glass wares which reacts with hydrofluoric acid, are made of the ______________ glass?
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A. Lead

B. Alkali silicate

C. Soda lime

D. Borosilicate
1093. Naphthols are derivatives of________________?
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A. Phenol

B. Methyl amine

C. Xylene

D. Naphthalene
1094. The main use of activated carbon in water treatment is to control ___________________?
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A. Turbidity

B. Taste and odour

C. Bacterial growth

D. None of these

1095. Solvay process is used for the manufacture of____________________?
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A. Soda lime

B. Caustic soda

C. Caustic potash

D. Soda ash
1096. Which of the following is not an insecticide ?
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A. Hydrocyanic acid

B. Nicotine

C. Hexane

D. Sodium fluoride

1097. Concentration of NaOH solution produced by diaphragm electrolytic cell is about _______________ percent?
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A. 10

B. 25

C. 98

D. 50

1098. The difference between saponification value and acid value is____________________?
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A. Constant for all fatty oils

B. Called ester value

C. None of these

D. Always negative

1099. Air used in aerobic fermentation must be sterilized, otherwise the ___________________?
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A. Contamination of pure culture would result

B. None of these

C. Recovery of product will be difficult

D. Uniformity of product cannot be achieved

1100. Bromides contained in hot mother liquor is treated with ______________ during manufacture of bromine from sea water ?
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A. Cl2

B. SO3

C. SO2

D. NH3