chemical engineering chemical process MCQs – Page 24

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 Review each marked answer and report any item that may be outdated or unclear.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
461. Roasting of metallurgical ores is done mainly to ___________________?
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A. Remove arsenic & sulphur

B. Remove CO2 & H2O

C. Sinter the ore

D. Dehydrate it

462. Which of the following is a disaccharide ?
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A. Starch

B. Maltose

C. Glucose

D. Sucrose
463. Brackish water which contains mostly dissolved salt, can be purified by the __________________ process?
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A. Sand filter

B. Reverse osmosis

C. Lime soda

D. Permutit

464. The catalyst used in the production of elemental sulphur from H2S (by oxidation-reduction) is _____________________?
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A. Nickel

B. Silica gel

C. Platinum

D. Alumina
465. High acid value of an oil or fat is an indication of _____________________?
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A. Storage under improper conditions

B. None of these

C. Absence of unsaturation

D. Its smaller molecular weight

466. ______________ are added in lacquers to remove film brittleness and to improve adhereness?
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A. Solvents

B. Film forming materials

C. Plasticisers

D. Diluents

467. Calcareous & argillaceous materials are used in the manufacture of ___________________?
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A. None of these

B. Lead

C. Cement

D. Carbon disulphide

468. The purpose of adding Na2CO3 to water of low alkalinity is to__________________?
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A. Facilitate easy regeneration of zeolite

B. Increase the softening capacity of zeolite

C. All A , B. and C.

D. Permit the use of alum as a coagulant
469. Oils are partially hydrogenated (not fully) to manufacture Vanaspati, because fully saturated solidified oils________________?
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A. Cause cholesterol build up and blood clotting

B. Have affinity to retain harmful sulphur compounds

C. Are prone to rancid oxidation

D. Always contain some amount of nickel (as their complete removal is very difficult)

470. Massecuite is a terminology used in the ______________ industry ?
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A. Sugar

B. Paint

C. Oil hydrogenation

D. Soap

471. _________________ is not a constituent of gun powder?
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A. Carbon

B. Potassium nitrate

C. Sulphur

D. Charcoal

472. Trinitrotoluene (TNT), an explosive, is made by the nitration of ____________________?
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A. Nitrotoluene

B. Toluene

C. Benzene

D. Nitrobenzene

473. Sea weeds are an important source of_________________?
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A. Chlorine

B. Iodine

C. Bromine

D. Fluorine

474. Starting raw material for the manufacture of Maleic anhydride is___________________?
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A. n-butene

B. Either A. or B.

C. Neither A. nor B.

D. Benzene

475. Pick out the wrong statement ?
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A. Fibrillation of fibre during paper manufacture is done to develop the strength in paper

B. Alkali consumption in digestion/cooking of bamboo is measured in terms of permanganate

C. ber

D. Bagasse fibre contains both lignin & cellulose

E. Presence of sodium sulphate in pulp makes the pulp bleachability poor
476. Dichloro diphenyl ________________ is the full form of DDT (an insecticide) ?
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A. Tetrachloroethane

B. Trichloromethane

C. Tetrachloromethane

D. Trichloroethane
477. Presence of sodium tripolyphosphate (an additive) in synthetic detergent___________________?
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A. Does not allow redeposition of dirt on the cleaned surface

B. None of these

C. Inhibits its corrosive effects

D. Facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions)
478. Higher viscosity index of a lubricating oil denotes_______________?
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A. Its unsuitability under varying temperature conditions

B. None of these

C. Less changes in fluidity of oil with temperature

D. Substantially high change in fluidity of oil with temperature

479. Hydrogenation of edible vegetable oils_________________?
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A. Is done in presence of nickel catalyst

B. Increases their melting point

C. All A , B. and C.

D. Is an exothermic reaction

480. Essential oils are usually obtained using__________________?
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A. Extractive distillation

B. Leaching

C. Steam distillation

D. Solvent extraction