chemical engineering chemical process MCQs – Page 28

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 Review each marked answer and report any item that may be outdated or unclear.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
541. Coagulant is used _________________ filtration?
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A. After

B. To avoid

C. Before

D. During

542. Which is the most efficient absorbent for SO3 out of the following ?
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A. 65% oleum

B. 20% oleum

C. 98% H2SO4

D. 78% H2SO4

543. Adipic acid is an intermediate in the manufacture of________________?
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A. Perspex

B. Bakelite

C. Nylon-66

D. Polystyrene

544. Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement ?
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A. Calcium & aluminium stearate

B. Xanthates

C. Stearic acid

D. Formic acid

545. The basic difference between vegetable oils and fats is in their ___________________?
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A. Chemical properties

B. Density

C. Composition

D. Physical state
546. Which of the following is used as a coagulant in water treatment ?
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A. Hydrogen peroxide

B. Chlorine

C. Ferrous sulphate

D. Chloramine

547. Conversion of SO2 to SO3 in Monsanto 4-pass converter is about ____________________ percent?
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A. 100

B. 80

C. 90

D. 98
548. Phenol formaldehyde resin is used as an adhesive in making__________________?
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A. Laminates

B. Furniture

C. Books

D. Card boxes

549. The catalyst used in shift converter is___________________?
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A. Alumina

B. Vanadium

C. Nickel

D. Silica gel

550. During the absorption of HCl gas in water (to produce liquid HCl), the gas is kept above dew point to__________________?
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A. Increase the rate of absorption

B. Reduce the cooling water circulation rate

C. Avoid corrosion

D. None of these

551. Which of the following, when pyrolysed, produces Perchloroethylene ?
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A. Ethylene dichloride

B. Carbon tetrachloride

C. Chlorinated paraffin

D. Chlorobenzene

552. Polythene is a/an ______________ polymerisation product?
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A. Addition

B. Thermosetting

C. Condensation

D. None of these

553. Magnesium and calcium ______________ cause temporary hardness of water ?
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A. Carbonates

B. Phosphates

C. Bicarbonates

D. Sulphates

554. Nitrogen is an essential component of ____________________?
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A. Proteins

B. Fats

C. Mineral salts

D. Carbohydrates

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

B. 150-200

C. 25

D. 60-70
556. Which of the following is an endothermic reaction ?
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A. Absorption of SO3 in 98% H2SO4

B. C + H2O = CO + H2

C. Thermal dissociation of iron pyrites

D. Both B. and C.
557. Sulphur removal by heating of pyrite ore in presence of air is called its ____________________?
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A. Roasting

B. Reduction

C. Smelting

D. Calcination

558. Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at __________________?
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A. 5 atm & 275C

B. 1 atm & 100C

C. 50 atm & 1000C

D. 100 atm & 500C

559. Bromine is used in the preparation of___________________?
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A. All A , B. and C.

B. Fire extinguishing compounds

C. Dyes and antiknock compounds

D. Fire proofing agents

560. Which of the following is used as a binding material in soap to improve soap texture ?
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A. Rosin

B. Borax

C. Benzyl acetate

D. Sodium carbonate