chemical engineering MCQs – Page 67

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 Review each marked answer and report any item that may be outdated or unclear.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

1321. Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its________________?
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A. Greater tendency of decomposition at elevated temperature

B. Hydrolysis tendency in presence of water

C. Poor oxidation stability and high gum forming tendency

D. All A, B. and C

1322. Pick out the true statement pertaining to water treatment ?
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A. Slow sand filters can remove colour completely

B. Activated carbon can be used for taste & odour control without subsequent filtration

C. Application of activated carbon reduces the temporary hardness of water

D. Normally, the turbidity is removed by adding a coagulant prior to sedimentation

1323. Esterification reaction___________________?
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A. Is a reaction between an alcohol and an organic acid

B. All A, B. and C.

C. Is reversible

D. Produces soap

1324. Alum [Al2(SO4)3] is used as a coagulant in water treatment to remove____________________?
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A. All A , B. and C.

B. Colour

C. Bacteria

D. Turbidity

1325. In the manufacture of viscose rayon, the raw material used industrially is ____________________?
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A. Bagasse

B. Fine teak wood

C. Eucalyptus wood

D. Bamboo

1326. Hydrogenation of edible vegetable oils_________________?
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A. Is done in presence of nickel catalyst

B. Is an exothermic reaction

C. Increases their melting point

D. All A , B. and C.

1327. ______________ paper is used in the manufacture of newsprint paper ?
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A. Board

B. Tissue

C. Ground-wood

D. Wrapping

1328. Pick out the wrong statement ?
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A. None of these

B. Cold rubber (SBR) is superior as compared to hot rubber (SBR)

C. Polymerisation temperature can modify the properties of SBR

D. Production of cold SBR employs lower pressure as compared to that of hot SBR

1329. Roasting of metallurgical ores is done mainly to ___________________?
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A. Sinter the ore

B. Dehydrate it

C. Remove CO2 & H2O

D. Remove arsenic & sulphur

1330. Type of glass used in optical work is the ___________________ glass?
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A. Fibre

B. Lead

C. Borosilicate

D. Soda-lime

1331. BHC (Benzene hexachloride) is made by the chlorination of benzene_____________________?
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A. Which is a substitution reaction

B. In absolute dark

C. Which is an addition reaction

D. In presence of sunlight

1332. Starting raw material for the manufacture of Maleic anhydride is___________________?
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A. Neither A. nor B.

B. Benzene

C. Either A. or B.

D. n-butene

1333. Brackish water which contains mostly dissolved salt, can be purified by the __________________ process?
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A. Sand filter

B. Permutit

C. Reverse osmosis

D. Lime soda

1334. Fermentator temperature during production of alcohol from molasses is around ______________ C?
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A. 5

B. 300

C. 130

D. 30

1335. Removal of dirt/soil by soaps or detergent does not involve the _______________ of soil ?
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A. Wetting

B. Emulsification

C. Dispersion

D. Precipitation

1336. Bromine is used in the preparation of___________________?
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A. All A , B. and C.

B. Dyes and antiknock compounds

C. Fire proofing agents

D. Fire extinguishing compounds

1337. Saponification value/number of an oil or fat is a measure of its ___________________?
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A. Average molecular weight

B. Degree of unsaturation of the fatty acids present in it

C. Insoluble fatty acid content

D. Fatty acid content

1338. Concentration of hydrogen peroxide is done by_____________________?
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A. Crystallisation

B. Dehydration

C. Vacuum crystallisation

D. Atmospheric distillation

1339. Cellulose percentage in bamboo fibre is about_________________?
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A. 85

B. 50

C. 10

D. 20

1340. Solvent used for extraction of oil is_____________________?
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A. Methyl ethyl ketone

B. None of these

C. Furfural

D. Hexane

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