chemical engineering chemical process MCQs – Page 15

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 Review each marked answer and report any item that may be outdated or unclear.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
281. High purity nitrogen is used in__________________?
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A. Making protective gas (95% N2 + 5% H2) for annealing of cold rolled steel strip coils

B. Fire fighting purposes

C. Both A. & B.

D. Neither A. nor (B)

282. Finely ground calcium aluminate & silicate is a/an ____________________?
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A. Abrasive

B. Explosive

C. Cermet

D. Cement
283. Poly Vinyl Chloride (P.V.C.) is a ______________ material ?
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A. Thermosetting

B. Fibrous

C. Thermoplastic

D. Chemically active

284. Cation exchanger is regenerated usually with_________________________?
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A. Hydrazine

B. H2SO4

C. Alum solution

D. NaOH

285. Which is the most suitable dye for synthetic fibres ?
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A. Mordant dye

B. Azoic dye

C. Acid dye

D. Pigment dye

286. Producer gas consists mainly of________________________?
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A. H2, CH4

B. C2H2, CO2, H2

C. CO, CO2 N2, H2

D. CO, H2

287. Chlorine gas is produced by the electrolysis of brine (NaCl solution with solid NaCl make up) in mercury electrolytic cell. Which of the following is the anodic reaction ?
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A. Oxidation of Cl- ions

B. Oxidation of Na+ ions

C. Reduction of Cl- ions

D. Reduction of Na+ ions

288. Which of the following paper does not require a filler during manufacture ?
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A. Bond paper

B. Writing paper

C. Blotting paper

D. Coloured paper

289. Sulphur addition in soap is done to _____________________?
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A. Cure pimples & dandruff

B. Fasten lather formation

C. Improve the soap texture

D. Increase its cleansing action

290. The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is _________________?
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A. Ultraviolet light

B. Oleum

C. Dilute H2SO4

D. None of these

291. P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as____________________?
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A. Nylon-66

B. Bakelite

C. Neoprene

D. Teflon
292. Percentage of alcohol in beer may be around ______________________ percent?
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A. 4-Jan

B. 2-8

C. 27-32

D. 18-23

293. Phthalic anhydride is used____________________?
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A. In making PVC

B. As plasticisers

C. For making nylon-6

D. In insecticides manufacture

294. A mineral is termed as ore, if ____________________?
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A. A metal can be economically extracted from it

B. The metal present in it is costly

C. It contains ? 40% metal

D. All A , B. and C.

295. Which of the following is not an insecticide ?
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A. Nicotine

B. Sodium fluoride

C. Hexane

D. Hydrocyanic acid

296. Calcination of limestone is not done in a ______________ kiln for producing lime ?
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A. Fixed bed

B. Fluidised bed

C. Vertical shaft

D. Rotary

297. Which of the following fuel gases contains maximum amount of carbon monoxide ?
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A. Water gas

B. Coke oven gas

C. Blast furnace gas

D. L.D. converter gas
298. Which of the following is not responsible for causing permanent hardness of water ?
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A. None of these

B. CaCl2

C. Ca(HCO3)2

D. MgCl2

299. The main component of Pyrex glass is_____________________?
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A. Selenium

B. Zinc

C. Boron

D. Lead
300. Main constituents of natural rubber is____________________?
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A. Polystyrene

B. Polyisoprene

C. Polychlorophrene

D. Polybutadiene