chemical engineering MCQs – Page 75

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 Review each marked answer and report any item that may be outdated or unclear.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
1481. The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by_________________?
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A. None of these

B. Electrolysis

C. Electrolytic oxidation

D. Electrolytic reduction
1482. Thorium is mainly used _______________?
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A. In the manufacture of hydrogen bomb

B. In the treatment of cancer

C. As a fissile fuel in a nuclear reactor

D. For the manufacture of gas mantles
1483. Very dilute solutions are generally used in fermentation reactions for which the optimum temperature range is ____________ C?
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A. 30 to 50

B. 5 to 10

C. 75 to 80

D. -5 to 0

1484. Diaphragm electrolytic cell as compared to mercury electrolytic cell_____________________?
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A. Requires lesser investment for similar capacity

B. Produces 70% NaOH solution

C. All A , B. and C

D. Requires less specific power consumption for the production of chlorine

1485. Glycerine is not used in the____________________?
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A. Conditioning and humidification of tobacco

B. None of these

C. Manufacture of explosive

D. Manufacture of pharmaceuticals

1486. Main constituent of dolomite is __________________?
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A. Na2CO3

B. MgCO3

C. CaCO3

D. K2CO3

1487. Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have___________________?
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A. Low co-efficient of thermal expansion

B. High electrical insulation properties

C. Compressive strength much greater than their tensile strengths

D. Sharp melting points
1488. Cement mainly contains_________________?
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A. CaO, SiO2, Al2O3

B. Al2O3, MgO, Fe2O3

C. MgO, SiO2, K2O

D. CaO, MgO, K2O

1489. Sucrose is a disaccharide consisting of____________________?
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A. Glucose and glucose

B. Fructose and galactose

C. Glucose and galactose

D. Glucose and fructose
1490. Liquor poisoning generally occurs due to the presence of _________________ in it ?
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A. Carbonic acid

B. Impurities

C. Methyl alcohol

D. Ethyl alcohol

1491. Salt cake is chemically represented by_________________?
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A. BaSO4

B. MgSO4

C. CaSO4. H2O

D. Na2SO4
1492. Which of the following is not required in the manufacture of soda ash by Solvay process ?
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A. Limestone

B. None of these

C. Ammonia

D. Nitric acid
1493. Hydrogenation of oil/fat does not_________________?
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A. Improve its resistance to rancid oxidation

B. Remove double bonds

C. Raise its melting point

D. None of these
1494. Oxygen is produced by fractionation of air using _____________ process?
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A. Claudes

B. Lindes

C. Either A. or B.

D. None of these

1495. Large scale drying of sugar is done in a _______________ dryer?
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A. Spouted bed

B. Truck

C. Rotary

D. Tray

1496. Soaps remove dirt by ____________________?
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A. Increasing the surface tension

B. None of these

C. Supplying hydrophilic group

D. Decreasing wettability

1497. Separation of two volatile liquids by distillation makes use of their___________________?
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A. Relative volatility

B. Selectivity

C. Solubility

D. Density difference

1498. _____________ extractor is used for the concentration of radioactive nuclear waste?
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A. Sieve plate

B. Mixer-settler

C. Bollman

D. Pulsed column
1499. Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement ?
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A. Calcium & aluminium stearate

B. Stearic acid

C. Formic acid

D. Xanthates

1500. Blue vitriol is chemically___________________?
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A. Aluminium sulphate

B. Copper sulphate

C. Ferrous sulphate

D. Copper nitrate