chemical engineering chemical process MCQs – Page 2

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 Review each marked answer and report any item that may be outdated or unclear.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

21. Teflon is___________________?
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A. An inorganic polymer

B. A monomer

C. Poly tetra-fluoro-ethylene (P.T.F.E.)

D. Phenol formaldehyde

22. ______________________ of quicklime produces slaked lime ?
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A. Dehydration

B. Hydration

C. None of these

D. Hydrogenation

23. In contact process, SO3 is absorbed in 97% H2SO4 and not in water, because___________________?
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A. The purity of acid is affected

B. Scale formation in the absorber is to be avoided

C. SO3 gas is sparingly soluble in water

D. Water forms an acid mist, which is difficult to absorb

24. Chemical formula of BHC, which is an insecticide is__________________?
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A. C6H5Cl

B. C6H6Cl6

C. C6H4Cl2

D. C6Cl6

25. Nicotine is___________________?
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A. A volatile alkaloid

B. Obtained by treating by-products of the tobacco processing industry

C. Both A. and B.

D. Neither A. nor B.

26. An oil is converted into fat by its___________________?
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A. Hydrolysis

B. Hydrogenation

C. Hydration

D. Hydrocracking

27. Soap cannot be used with hard water, because _________________?
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A. Hard water contains sulphate

B. They attract back the removed dirt

C. They form insoluble calcium soaps which precipitate

D. None of these

28. SO2 is bubbled through hot sugar cane juice to_______________?
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A. Increase the amount of molasses

B. Increase the crystal size

C. Increase its concentration

D. Act as an acidifying agent

29. The most reactive allotropic form of phosphorus is __________________ phosphorus?
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A. Violet

B. Black

C. Red

D. Yellow

30. Penicillin, an antibiotic drug was discovered by__________________?
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A. Doctor Zhivago

B. Flaming

C. Alexander

D. None of these

31. Celluloid is chemically___________________?
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A. Cellulose nitrate

B. Cellulose acetate

C. Cellulose acetate butyrate

D. Regenerated cellulose

32. Flux addition during smelting of ore is done to___________________?
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A. Separate slag from metal

B. Enhance rate of reaction

C. Accelerate reduction of ore

D. Remove impurities/gangue

33. 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.

34. Sucrose is a__________________?
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A. None of these

B. Monosaccharide

C. Disaccharide

D. Polysaccharide

35. Fermentation is adversely affected by the____________________?
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A. Presence of ammonium salts

B. High concentration

C. Absence of air

D. Presence of air

36. One of the steps during refining of cane sugar consists of addition of hydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to_________________?
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A. Reduce the viscosity of the syrup

B. Adjust the pH of the syrup

C. Remove the coloring matter from the syrup

D. Improve the rate of crystallisation of sugar

37. Sizing material is incorporated in paper to___________________?
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A. Impart resistance to penetration by liquids

B. Increase its flexibility & opacity

C. Increase its brightness

D. Increase its thickness

38. Lithophane is ___________________?
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A. Filter aid

B. White lead

C. Explosive

D. ZnS (white pigment)

39. Penicillin is separated from fermented broth by ____________________?
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A. Extractive distillation

B. Extraction with amyl or butyl acetate

C. Evaporator in calandria

D. Ternary Azeotropic distillation

40. Hydrocyanic acid (HCN) is used as an insecticide for____________________?
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A. Controlling timber degradation by ants

B. Citrus fruits

C. Potato beetle

D. Controlling poultry lice

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