chemical engineering MCQs – Page 64

Practise multiple-choice questions from chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs
1261. Pick out the wrong statement ?
comments icon0

A. Contact process of sulphuric acid manufacture produces pure acid of concentration ? 98%

B. 75% oleum can be produced by distillation of 20% oleum

C. Contact process of sulphuric acid manufacture uses nickel as the catalyst

D. Chamber process of sulphuric acid manufacture produces pure acid of concentration < 80%

1262. Carboxymethyl cellulose (CMC) is added in detergents to act as a/an___________________?
comments icon0

A. Optical brightening agent

B. Surfactant

C. Anti soil redeposition agent

D. Builder

1263. Reverse osmosis is normally used for the_______________?
comments icon0

A. Separation of isotopes of uranium from gaseous uranium hexafluoride

B. Purification of oxygen

C. Separation of helium from natural gas

D. Desalination of brackish water to produce potable (drinking) water
1264. Which of the following is a detergent ?
comments icon0
A. Alkyl benzene sulphonate

B. Benzene hexachloride

C. Cellulose nitrate

D. Polytetrafluoroethylene

1265. DDT should not be allowed to come in contact with iron (during its manufacture) to _______________?
comments icon0

A. Prevent sulphonation of the monochlorobenzene by the acid catalyst

B. Achieve non-hygroscopic property

C. None of these

D. Avoid its decomposition
1266. Which is the most efficient absorbent for SO3 out of the following ?
comments icon0

A. 78% H2SO4

B. 98% H2SO4

C. 20% oleum

D. 65% oleum

1267. Dehydrogenation of ethyl benzene produces __________________ ?
comments icon0

A. Phenol

B. Styrene

C. Naphthalene

D. Benzoic acid

1268. Higher viscosity index of a lubricating oil denotes_______________?
comments icon0

A. Its unsuitability under varying temperature conditions

B. None of these

C. Substantially high change in fluidity of oil with temperature

D. Less changes in fluidity of oil with temperature
1269. Alum is commercially produced from___________________?
comments icon0
A. Bauxite

B. Feldspar

C. Gypsum

D. Galena

1270. Addition of calcium oxide to water produces___________________?
comments icon0

A. Slaked lime

B. All A , B. & C .

C. Hissing sound

D. Exothermic heat

1271. Argon is the third largest constituent of air (followed by N2 & O2). Its percentage by volume in air is___________________?
comments icon0

A. 0.14

B. 0.94

C. 0.34

D. 1.4

1272. The catalyst used in shift converter is___________________?
comments icon0
A. Nickel

B. Vanadium

C. Silica gel

D. Alumina

1273. Pick out the wrong statement ?
comments icon0

A. Insurance rates on annual basis in a chemical plant may be about 1% of the fixed capital

B. In a chemical industry, research and development cost amounts to about 15% of net sales

C. Annual depreciation rate of buildings in a chemical plant is about 3% of its initial cost

D. estment

E. The annual depreciation rate for machinery and equipments in a chemical process plant is

F. ut 10% of the fixed capital investment

1274. Styrene-butadiene-rubber (SBR) as compared to natural rubber has________________?
comments icon0

A. Greater amount of heat build-up under heavy loading

B. Poorer resistance to oxidation

C. All A , B. and C.

D. Poorer tensile strength

1275. Catalyst used in the hydrogenation of oil is_________________?
comments icon0

A. Iron

B. Nickel

C. Alumina

D. Platinum

1276. Vanillin is a type of____________________?
comments icon0

A. Dye

B. Flavour

C. Anti-pyretic drug

D. Food preservative

1277. Which of the following is an organometallic compound ?
comments icon0

A. Isopropyl alcohol

B. Tetra-ethyl lead

C. Zeolite

D. Cumene

1278. ______________ is used as a flux in the extraction of iron from iron ore (haematite) in blast furnace?
comments icon0
A. Limestone

B. Bauxite

C. Manganese

D. Quartz

1279. Alcohol is produced by the___________________?
comments icon0

A. None of these

B. Esterification of a fat

C. Hydrolysis of an ether

D. Oxidation of an aldehyde

1280. Transparent soaps (e.g. Pears) are____________________?
comments icon0

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

B. ally washed with methylated spirit to achieve transparency</strong>

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

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

E. None of these