chemical engineering MCQs – Page 62

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 Review each marked answer and report any item that may be outdated or unclear.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
1221. Fish contains about _______________ percent oil ?
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A. 10

B. 5

C. 20

D. 35

1222. Styrene is produced from ethyl benzene by the process of________________?
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A. Alkylation

B. Dehydration

C. Dehydrogenation

D. Oxidation

1223. Viscose rayon is chemically___________________?
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A. Cellulose nitrate

B. Regenerated cellulose acetate

C. Regenerated cellulose nitrate

D. Cellulose acetate

1224. Flux addition during smelting of ore is done to___________________?
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A. Remove impurities/gangue

B. Separate slag from metal

C. Enhance rate of reaction

D. Accelerate reduction of ore

1225. Wet chlorine gas produced during electrolysis of brine is dehydrated by__________________?
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A. None of these

B. Passing it through a bed of silica gel

C. Passing it through a bed of diatomaceous earth

D. Spraying 66 Be H2SO4 counter current to the flow of the gas
1226. Phosphate rock is a raw material for the manufacture of____________________?
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A. Phosphoric acid

B. All A , B. and C

C. Phosphorous

D. Superphosphates

1227. Prussian blue is chemically represented by__________________?
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A. FeO.TiO2

B. AlF3 . 3NaF

C. Fe4 [Fe (CN6)3]

D. Ca SO4 . 2H2O

1228. Pure rectified spirit contains about _________________ percent alcohol?
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A. 45

B. 95

C. 70

D. 99.5

1229. In sulphate pulp manufacture, the pressure and temperature in the digestor is____________________?
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A. 10 atm., 800 C

B. 1 atm., 170 180C

C. 1 atm., 800C

D. 10 atm., 170-180C
1230. Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action of chlorine on ____________________?
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A. Slaked lime

B. None of these

C. Calcium perchlorate

D. Soda lime

1231. Glycerine is recovered from lye by ___________________?
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A. Extractive distillation technique

B. Evaporation followed by vacuum distillation

C. None of these

D. Liquid extraction technique

1232. A mineral is termed as ore, if ____________________?
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A. A metal can be economically extracted from it

B. It contains ? 40% metal

C. The metal present in it is costly

D. All A , B. and C.

1233. Which of the following is not produced commercially from sea water ?
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A. Common salt

B. Magnesium & potassium compounds

C. Iodine

D. Bromine

1234. Calcination of limestone is not done in a ______________ kiln for producing lime ?
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A. Fixed bed

B. Rotary

C. Fluidised bed

D. Vertical shaft

1235. Main product in calcium carbide-water reaction is___________________?
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A. CaCO3

B. CO2

C. C2H2

D. Ca(OH)2

1236. Fat splitting catalyst is__________________?
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A. CaCO3

B. ZnO

C. Al2O3

D. Fe

1237. Zeigler process__________________?
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A. Produces high density polyethylene

B. Produces low density polyethylene

C. Uses no catalyst

D. Employs very high pressure

1238. Rancidity of the fatty oil can be reduced by its__________________?
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A. Oxidation

B. Hydrogenation

C. Decoloration

D. Purification

1239. Hydrolysis of sugar is called_____________________?
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A. Esterification

B. Inversion

C. Hydration

D. None of these

1240. Which of the following coals has the highest calorific value ?
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A. Lignite

B. Peat

C. Sub-bituminous

D. Anthracite