Chemical Process - Chemical Engineering Questions and Answers

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Which one of the following is not an elastomer ?

Polyisoperene

Neoprene

Nitrile-butadiene

None of these

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Which of the following processes can remove both temporary as well as permanent hardness of water ?

Filtration

Boiling

Distillation

None of these

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Dacron is a

condensation product of hexam-ethylene diamine and adipic acid.

thermosetting material.

condensation product of dimethyl terephthalate and ethylene glycol.

none of these.

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Rancidity of the fatty oil can be reduced by its

decoloration

hydrogenation

oxidation

purification

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Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like

high cost

fragile nature

easy poisoning tendency

all (a), (b) and (c)

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__________ of rubber decreases after its vulcanisation.

Resistance to the action of organic solvent

Tackiness

Maximum service temperature

Tensile strength

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Boiling of water containing temporary hardness produces

CO₂

CaSO₄

CaHCO₃

none of these

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Starting material for the commercial production of ethyl alcohol in India is

rice

molasses

fruit of Mahua tree

maize

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Phenol formaldehyde

employs addition polymerisation.

employs condensation polymerisation.

is a monomer.

is an abrasive material.