Chemical Process - Chemical Engineering Questions and Answers

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Bakelite is chemically known as

polyvinyl chloride (PVC)

polybutadiene

phenol formaldehyde

polyurathane

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Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine ?

Na₂CO₃

NaHCO₃

H₂

none of these

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Phthalic anhydride is made by the

oxidation of naphthalene.

oxidation of benzene.

dehydrogenation of ethyl benzene.

none of these.

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RDX (an explosive), which is more sensitive but less toxic than TNT, is chemically

cyclo trimethylene trinitramine.

trinitro resorcinol.

cyclo tetramethylene tetranitramine.

trinitro benzene.

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Raw material used in alcohol distilleries in India is

molasses

benzol

methylated spirit

none of these

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Oil produced by solvent extraction

has low free fatty acid content.

is odourless.

both (a) &(b).

neither (a) nor (b).

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High acid value of an oil or fat is an indication of

storage under improper conditions.

absence of unsaturation.

its smaller molecular weight.

none of these.

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Yeast is used in the manufacture of

pencillin

antibiotics

wine

pasteurised milk

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Liquefaction of gases can not be done by

exchange of heat with colder stream.

adiabatic expansion through a throttle valve (Joule-Thomson expansion).

merely compressing it beyond critical pressure.

adiabatic expansion against a piston or in a turbine.