chemical engineering MCQs – Page 69

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 Review each marked answer and report any item that may be outdated or unclear.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

1361. Pick out the wrong statement?
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A. The chemical formula of oleum is H2S2O7, which is formed by saturating sulphuric acid with

B. Vitriol oil is nothing but technical sulphuric acid

C. phur trioxide

D. Conversion of SO2 to SO3 in Monsanto-4 pass converter is about 98%

E. Decomposition of sulphuric acid on heating does not start before its boiling

1362. Co-efficient of thermal expansion of glass is decreased by the addition of _______________ during its manufacture?
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A. ZnO

B. MnO2

C. FeS

D. CaO

1363. Catalytic oxidation-dehydrogenation of methyl alcohol produces__________________?
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A. Maleic anhydride

B. Acetone

C. Phenol

D. Formaldehyde

1364. L.D. converter is used in the production of_________________?
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A. Zinc

B. Steel

C. Pig iron

D. Copper

1365. Essential oils are usually obtained using__________________?
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A. Steam distillation

B. Extractive distillation

C. Solvent extraction

D. Leaching

1366. Pick out the wrong statement ?
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A. Fibrillation of fibre during paper manufacture is done to develop the strength in paper

B. Alkali consumption in digestion/cooking of bamboo is measured in terms of permanganate

C. ber

D. Bagasse fibre contains both lignin & cellulose

E. Presence of sodium sulphate in pulp makes the pulp bleachability poor

1367. Synthesis gas meant for the synthesis of organic compound is a variable mixture of ____________________?
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A. C & H2

B. N2 & H2

C. CO & H2

D. CO2 & H2

1368. Alkylbenzene sulfonate (ABS) is a____________________?
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A. Polyester

B. Pesticide

C. Detergent

D. Rubber

1369. Commonly used glass is known as the _______________ glass?
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A. Flint

B. Hard

C. Soda

D. Pyrex

1370. Use of chlorine in the treatment of sewage_________________?
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A. Helps in grease separation

B. Causes bulking of activated sludge

C. Increases the biological oxygen demand (BOD)

D. Aids in flocculation

1371. Polythene is a/an ______________ polymerisation product?
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A. None of these

B. Thermosetting

C. Condensation

D. Addition

1372. Vinyl chloride (CH2 = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of __________________?
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A. 40 kg/cm2 & 200C

B. 100 kgf/cm2 & 500C

C. 10 kgf/cm2 & 1000C

D. 4 kgf/cm2 & 500C

1373. The catalyst used in the production of elemental sulphur from H2S (by oxidation-reduction) is _____________________?
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A. Platinum

B. Alumina

C. Silica gel

D. Nickel

1374. Chloramines are used in water treatment for_____________________?
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A. Removing turbidity

B. Disinfection and control of taste & odour

C. Corrosion control

D. Control of bacteria

1375. Saponification number of an oil or fat____________________?
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A. All A , B. & C.

B. Detects its adulteration

C. Gives an idea about its molecular weight

D. Is inversely proportional to its molecular weight

1376. Fumigant insecticides___________________?
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A. None of these

B. Kill insects, when they eat it

C. Are absorbed throughout the plant

D. Emit poisonous vapour

1377. Exothermic neutralisation reaction between caustic soda and dodecylbenzene sulfonic acid produces sodium dodecylbenzene sulphate, which is a/an?
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A. Detergent

B. Analgesic drug

C. Explosive

D. Soap

1378. Caprolactam (a raw material for nylon-6 manufacture) is produced from ___________________?
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A. Naphthalene

B. Pyridine

C. Phenol

D. Benzene

1379. Concentration of NaOH solution produced by mercury electrolytic cell is about _______________ percent?
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A. 10

B. 98

C. 25

D. 50

1380. Nickel is not used as a catalyst in the __________________ reaction ?
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A. Shift conversion

B. Steaming reforming of naphtha

C. Ammonia cracking/dissociation

D. Oil hydrogenation

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