chemical engineering chemical process MCQs – Page 26

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 Review each marked answer and report any item that may be outdated or unclear.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
501. Chemical name of Grignard reagent is__________________?
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A. Sodium sulphite

B. Sodium thiosulphate

C. Sodium bicarbonate

D. Ethyl magnesium chloride
502. Use of chlorine in the treatment of sewage_________________?
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A. Causes bulking of activated sludge

B. Increases the biological oxygen demand (BOD)

C. Helps in grease separation

D. Aids in flocculation

503. Catalytic oxidation-dehydrogenation of methyl alcohol produces__________________?
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A. Acetone

B. Formaldehyde

C. Phenol

D. Maleic anhydride

504. Which form of sulphur is the most stable at room temperature ?
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A. Flowers of sulphur

B. Plastic

C. Rhombic

D. Monoclinic

505. Nickel is not used as a catalyst in the __________________ reaction ?
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A. Oil hydrogenation

B. Steaming reforming of naphtha

C. Shift conversion

D. Ammonia cracking/dissociation

506. Synthesis gas meant for the synthesis of organic compound is a variable mixture of ____________________?
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A. CO2 & H2

B. CO & H2

C. N2 & H2

D. C & H2

507. The function of gypsum addition during cement making is to_________________?
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A. Increase the density of cement

B. Decrease the cement setting rate

C. Both A. and B.

D. Neither A. nor B.

508. 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. Sharp melting points

C. High electrical insulation properties

D. Compressive strength much greater than their tensile strengths

509. 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.

510. Soaps remove dirt by ____________________?
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A. Supplying hydrophilic group

B. Decreasing wettability

C. Increasing the surface tension

D. None of these
511. Cellulose percentage in bamboo fibre is about_________________?
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A. 20

B. 85

C. 50

D. 10

512. Transparent soaps (e.g. Pears) are____________________?
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A. ally washed with methylated spirit to achieve transparency</strong>

B. Metallic soaps with frothing agent from which glycerine has not been recovered

C. Usually soft soap (made from coconut oil) in which cane sugar & alcohol are added and

D. None of these

E. Metallic soaps with frothing agent and free Stearic acid to achieve transparency

513. At very high concentration of enzymes, the rate of fermentation chemical reaction is _____________ the concentration of reactants?
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A. Inversely proportional to

B. Proportional to the square of

C. Independent of

D. Directly proportional to

514. In the Lurgi coal gasifier_________________?
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A. Low carbon conversion efficiency is achieved

B. Large quantity of coal can be processed

C. Coking coals cannot be used

D. Entrainment of solids is higher

515. Pick out the wrong statement pertaining to solvent extraction of oil. Rate of extraction__________________?
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A. Increases with the increasing flake size keeping the flake thickness constant

B. Increases considerably with the rise of temperature

C. Decreases as the moisture content of flakes increases

D. Decreases with decrease of thickness of the flakes

516. Which of the following is not a food additive ?
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A. Ammonium chloride

B. Citric acid

C. Benzoyl peroxide

D. Invertage

517. Pasteurisation of milk means______________________?
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A. Removal of fatty and albuminous substance from it

B. None of these

C. Killing of organisms present in it by heating it at controlled temperature without changing its

D. Inhibiting the growth of micro-organisms without killing them

E. ural characteristics</strong>

518. Carbon content of pitch (residue of coal tar distillation) is around ________________ percent?
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A. 70

B. 55

C. 94

D. 80

519. Detergent is produced by the sulphonation of dodecyl benzene, which is an ________________ reaction?
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A. Endothermic

B. Exothermic

C. Irreversible

D. Both B. and C.
520. Glaubers salt is chemically represented by____________________?
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A. Na2SO4.10H2O

B. CaCl(OCl)

C. CaSO4.H2O

D. (NH4)2SO4