chemical engineering chemical process MCQs – Page 23

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 Review each marked answer and report any item that may be outdated or unclear.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
441. Concentration of sulphide ores is done usually by____________________?
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A. Froth floatation

B. Roasting

C. Electromagnetic separation

D. Smelting

442. Gun powder uses_____________________?
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A. Potassium nitrate

B. Sulphur

C. Charcoal

D. All A , B, & C.
443. Which of the following is not an abrasive material ?
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A. Pumice

B. Carborundum

C. Corundum

D. Bakelite
444. Dehydrogenation of ethyl benzene produces __________________ ?
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A. Naphthalene

B. Benzoic acid

C. Styrene

D. Phenol

445. Carboxymethyl cellulose (CMC) is added in detergents to act as a/an___________________?
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A. Optical brightening agent

B. Anti soil redeposition agent

C. Builder

D. Surfactant

446. Percentage of uranium in Carnotite ore found in Jadugoda (Jharkhand) is about ___________________?
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A. 0.1 to 0.5

B. 15 to 25

C. 1 to 5

D. 5 to 10

447. Triple superphosphate is manufactured by reacting ____________________?
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A. Phosphate rock with nitric acid

B. Phosphate rock with sulphuric acid

C. Ammonium phosphate with phosphoric acid

D. Phosphate rock with phosphoric acid
448. Litharge is________________?
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A. Zinc oxide

B. Cellulosic photographic material

C. Lead oxide

D. Zinc sulphide

449. Kopper-Totzek coal gasifier_________________?
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A. Operate at very high pressure

B. Cannot use coking coal

C. Is a moving bed reactor

D. Can give ammonia synthesis gas (H2 + N2)
450. Cement mainly contains_________________?
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A. CaO, MgO, K2O

B. CaO, SiO2, Al2O3

C. MgO, SiO2, K2O

D. Al2O3, MgO, Fe2O3

451. Heating of _______________ to 120C, produces plaster of paris ?
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A. Calcium silicate

B. Calcium sulphate

C. Blue vitriol

D. Gypsum
452. Diaphragm electrolytic cell as compared to mercury electrolytic cell_____________________?
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A. Produces 70% NaOH solution

B. All A , B. and C

C. Requires lesser investment for similar capacity

D. Requires less specific power consumption for the production of chlorine

453. ______________ paper is used in the manufacture of newsprint paper ?
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A. Board

B. Ground-wood

C. Wrapping

D. Tissue

454. Margarine is a/an____________________?
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A. Plasticiser

B. Fat

C. Explosive

D. Rocket propellant

455. Average sulphur content in Indian pyrites is about _________________ percent?
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A. 35

B. 55

C. 15

D. 70

456. The process used for the manufacture of ethyl alcohol from molasses is_________________?
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A. Distillation

B. Dehydration

C. None of these

D. Dehydrogenation

457. Thermosetting materials ______________________?
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A. None of these

B. Soften on application of heat

C. Are solvent soluble

D. Are cross-linked molecules
458. CaO is called__________________?
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A. Calcite

B. Quick lime

C. Slaked lime

D. Limestone

459. Lurgi coal gasifier is a pressurised _______________ bed reactor ?
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A. Moving

B. Fixed

C. Entrained

D. Fluidised

460. Setting of plaster of Paris is accompanied with___________________?
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A. Hydrolysis

B. Dehydration

C. Loss of CO2

D. Hydration