chemical engineering chemical process MCQs – Page 14

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 Review each marked answer and report any item that may be outdated or unclear.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
261. Varnish does not contain_______________?
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A. Thinner

B. Pigment

C. Both A. & B.

D. Neither A. nor B.

262. Permanent hardness of water can be removed by_________________?
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A. Treating it with zeolites

B. Passing it through sodium hexametaphosphate

C. All A , B, and C.

D. Addition of soda ash to it

263. Which of the following is an yellow pigment ?
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A. Titanium dioxide

B. Zinc sulphides

C. Lead chromates

D. Ferrous sulphate

264. Lubricating greases are a mixture of__________________?
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A. Fatty oil and metallic soap

B. Mineral oil and metallic soap

C. Mineral oil and fatty oil

D. Mineral oil, soap and additives
265. _______________ is used as a flux in the smelting of copper ore like chalcopyrite ?
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A. Silica/quartz

B. Coke breeze

C. Dolomite

D. Lime powder

266. Manufacture of phthalic anhydride uses ______________ as a catalyst ?
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A. V2O5

B. Al2O3

C. Cr

D. Ni

267. Enzymes are organic catalysts used in the ____________________ reactions ?
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A. Biochemical

B. Photochemical

C. Chemical

D. Electrochemical

268. Commercial production of calcium carbide requires limestone and __________________ as raw materials?
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A. Coke

B. Fuel oil

C. Sand

D. Soda ash

269. In sulphate pulp manufacture, the pressure and temperature in the digestor is____________________?
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A. 1 atm., 800C

B. 1 atm., 170 180C

C. 10 atm., 170-180C

D. 10 atm., 800 C

270. The most commonly used substance to speed up the sedimentation of sewage is___________________?
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A. Sodium bisulphite

B. Chlorine

C. Sulphuric acid

D. Lime
271. Commonly used glass is known as the _______________ glass?
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A. Pyrex

B. Hard

C. Soda

D. Flint

272. The most economical pulp for the production of newsprint would be the _____________________ pulp?
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A. Sulphate

B. Semi-chemical

C. Sulphite

D. Ground-wood
273. Which catalyst is used in the manufacture of ethylene oxide by oxidation of ethylene ?
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A. AgO

B. ZnCl2

C. Fe2O3

D. Al2O3

274. Percentage of glycerine present in the spent lye obtained during soap manufacture is about________________?
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A. 0.5

B. 20

C. 5

D. 35

275. Concentration of NaOH solution produced by mercury electrolytic cell is about _______________ percent?
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A. 98

B. 10

C. 50

D. 25

276. Fusion of bauxite and ________________ produces high alumina cement?
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A. Alum

B. Coke

C. Limestone

D. Quartz

277. Dacron is a ___________________?
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A. Condensation product of Hexamethylene diamine and adipic acid

B. Condensation product of dimethyl terephthalate and ethylene glycol

C. Thermosetting material

D. None of these
278. Synthesis gas is a mixture of__________________?
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A. N2 and H2

B. CO2 and H2

C. H2, CH4 and CO

D. CO and H2
279. The most widely used coagulant for removing suspended impurities from water is__________________?
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A. Bleaching powder

B. Alum

C. Calcium sulphate

D. Chlorine

280. The end bleaching agent used to move last traces of colour bodies from the pulp is ____________________?
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A. MgO

B. Chlorine dioxide (ClO2)

C. Mercaptans

D. SO2 gas