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chemical engineering chemical process MCQs

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 Review each marked answer and report any item that may be outdated or unclear.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
1. Shrinkage volume in cement setting does not depend upon the _____________________?
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A. Drying period

B. Ambient temperature fluctuation

C. Water to cement ratio

D. Sand to cement ratio
2. ______________ Nature of hypo (sodium thiosulphate) makes it useful in photography ?
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A. Oxidising

B. Photochemical

C. Reducing

D. Complex forming
3. Which of the following is not a product of coal tar distillation ?
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A. None of these

B. Carbolic oil

C. Creosote oil

D. Anthracene

4. In the Solvay process, the product from the calciner is___________________?
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A. Dense soda ash

B. Light soda ash

C. Dehydrated soda ash

D. Sodium bicarbonate

5. Yellow glycerine is made into white, using____________________?
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A. Diatomaceous earth

B. Activated carbon

C. Bauxite

D. Bentonite

6. Extraction of _________________ employs an electrolytic process ?
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A. Silver

B. Copper

C. All A, B. and C

D. Aluminium
7. Industrial production of chloroform requires acetone and_____________________?
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A. Chlorine

B. Ammonium chloride

C. Phosgene

D. Calcium hypochlorite
8. Yellow phosphorus is transported under____________________?
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A. Air

B. Helium

C. Water

D. Nitrogen

9. Permanent hardness of water can be removed by___________________?
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A. None of these

B. Adding Ca(OH)2

C. Boiling

D. Boiling it with Na2CO3
10. CO & H2 are the constituents of___________________?
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A. Producer gas

B. All A., B. and C.

C. Water gas

D. Coke oven gas

11. The most popular and common detergent i.e., alkyl benzene sulfonate (ABS) is a/an ______________ detergent ?
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A. Semi polar

B. Amphoteric

C. Cationic

D. Anionic
12. Penicillin is made employing _______________ fermentation process?
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A. Anaerobic batch

B. None of these

C. Continuous

D. Aerobic batch
13. Hydrolysis of sugar is called_____________________?
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A. Inversion

B. None of these

C. Esterification

D. Hydration

14. Nitric acid is not used in the manufacture of______________________?
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A. Aqua regia

B. Detergents

C. Explosives

D. Fertilisers

15. Coloured glass is obtained by mixing of colored salts. Addition of ___________________ oxide is done to impart greenish blue color to the glass?
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A. Arsenic

B. Manganese

C. Chromium

D. Copper
16. A mixture of chlorine & sodium bromide acts as a/an_________________?
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A. Hydrogenation catalyst

B. Fire retardant

C. Analgesic drug

D. Insecticides

17. In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed ?
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A. Furnace ? evaporator ? absorber

B. Furnace ? converter ? absorber

C. Converter ? furnace ? absorber

D. Furnace ? converter ? evaporator

18. Inversion of sucrose produces_____________________?
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A. Fructose

B. Glucose

C. Both A. & B.

D. Neither A. nor B.

19. Naphthols are derivatives of________________?
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A. Methyl amine

B. Phenol

C. Xylene

D. Naphthalene
20. Baking soda is chemically represented by__________________?
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A. Na2CO3

B. NaHCO3

C. Na2CO3.H2O

D. Na2CO3.10H2O

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

41. _________________ is produced using Polycondensation Reaction?
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A. Phenol formaldehyde

B. None of these

C. Polythene

D. Poly vinyl chloride

42. 20% oleum means that in 100 kg oleum, there are 20 kg of_____________________?
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A. SO3 for each 100 kg of H2SO4

B. SO3 and 80kg of H2SO4

C. None of these

D. H2SO4 and 80kg of SO3

43. Dechlorination of treated water is necessary to __________________?
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A. Reduce the bacterial load on filter

B. Control taste and odour

C. Remove chlorinous taste

D. Remove residual turbidity

44. Phenolic antiseptics are added in the __________________ soap?
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A. Medicated

B. Shaving

C. Transparent

D. Metallic

45. Viscose rayon is__________________?
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A. Regenerated cellulose nitrate

B. Regenerated cellulose acetate

C. Cellulose nitrate

D. None of these
46. Chemical formula of oleum is_________________?
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A. H2SO7

B. H2SO4

C. H2SO3

D. H2S2O7
47. Commercially ethylene is produced from naphtha by ______________________?
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A. Pyrolysis

B. Catalytic cracking

C. Hydrocracking

D. Catalytic dehydrogenation

48. Phenol formaldehyde____________________?
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A. Is an abrasive material

B. Is a monomer

C. Employs addition polymerisation

D. Employs condensation polymerisation
49. What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in an electrolytic cell ?
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A. Cl2, H2 & NaOH solution

B. O2 & H2

C. Cl2 & Na

D. Cl2 & H2

50. Production of one ton of cement requires about _______________ tons of limestone ?
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A. 1.2

B. 0.6

C. 3.8

D. 2.2