chemical engineering MCQs – Page 72

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 Review each marked answer and report any item that may be outdated or unclear.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
1421. Nitro-glycerine absorbed in wood flour, sodium nitrate or ammonium nitrate is commercially used as controlled explosive called dynamite. The raw material used for its manufacture are glycerine, nitric acid and___________________?
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A. Hydrochloric acid

B. Phosphoric acid

C. Hydrofluoric acid

D. Sulphuric acid
1422. Which of the following is not a raw material used for the manufacture of ordinary glass ?
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A. Soda ash

B. Silica

C. Limestone

D. Iron oxide
1423. Unsaturated oils compared to saturated oils have___________________?
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A. Lower melting point & higher reactivity to oxygen

B. Lower melting point & lower reactivity to oxygen

C. Higher melting point & higher reactivity to oxygen

D. Higher melting point & lower reactivity to oxygen

1424. High acid value of an oil or fat is an indication of _____________________?
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A. Its smaller molecular weight

B. Storage under improper conditions

C. Absence of unsaturation

D. None of these

1425. Pick out the wrong statement ?
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A. Gun powder comprises of 75% salt petre, 15% charcoal and 10% sulphur

B. Low intensity explosives are also called propellants, whereas high intensity explosive are

C. Lead azide is a popular military explosive

D. led detonators

E. TNT is a hygroscopic explosive having very high melting point and is non-toxic to human

F. ng</strong>

1426. Which of the following has sodium bicarbonate as its main constituent ?
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A. Washing soda

B. Baking soda

C. None of these

D. Baking powder
1427. Terylene is__________________?
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A. Same as Dacron

B. A polyester

C. Both A. & B.

D. Neither A. nor B.

1428. Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is ______________ C?
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A. 250-300

B. 25

C. 60-70

D. 150-200

1429. Wood charcoal is used for decolouration of sugar, because it _______________ the coloured materials?
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A. Adsorbs

B. Converts

C. Reduces

D. Oxidises

1430. Sodium carbonate (soda ash) is not used in the manufacture of___________________?
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A. Detergents

B. Fire extinguishers

C. Baking powder

D. Sugar

1431. Styrene is produced from ethyl benzene by the process of__________________?
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A. Alkylation

B. Oxidation

C. Dehydration

D. Dehydrogenation
1432. ____________ process is used for the commercial production of nitric acid by the catalytic oxidation of ammonia ?
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A. None of these

B. Habers

C. Ostwalds

D. Solvay

1433. Production of alcohol by fermentation of molasses is a/an _____________ process?
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A. Anaerobic

B. Aerobic

C. Endothermic

D. Both B. and C.

1434. Nylon-66 is manufactured from____________________?
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A. Hexamethylene diamine and Maleic anhydride

B. Caprolactam

C. Hexamethylene diamine and adipic acid

D. Dimethyl terephthalate and ethylene glycol

1435. Fluorescent dyes are added in detergents to__________________?
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A. teness appearance of white fabrics</strong>

B. Act as fabric brightener (by converting ultraviolet light to visible light) thereby improving the

C. Act as tarnish inhibitor for metals like German silver

D. Attain distinctiveness from other brands

E. None of these

1436. Bleaching action of bleaching powder is due to its _____________ properties ?
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A. Reducing

B. None of these

C. Disinfecting

D. Oxidising
1437. Setting of plaster of Paris is accompanied with___________________?
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A. Loss of CO2

B. Dehydration

C. Hydration

D. Hydrolysis

1438. The major constituents of glass are____________________?
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A. Silica, alumina and soda ash

B. Lime, clay and soda ash

C. Sand, lime and soda ash

D. Silica, alumina and clay

1439. Which of the following is not an abrasive material ?
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A. Carborundum

B. Corundum

C. Bakelite

D. Pumice

1440. Anion exchanger is regenerated usually with ____________________?
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A. NaOH

B. H2SO4

C. Hydrazine

D. Alum solution