Chemical Process - Chemical Engineering Questions and Answers

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The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to

Avoid mechanical weakening of fibre

Remove lignin by way of crystallisation

Increase the cellulose content

None of these

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Rosin soap is added during paper manufacture to

Impart adhesive properties

Improve opacity

Impart resistance to penetration by liquids

None of these

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Sulphuric acid is mainly used in the __________ industry.

Fertiliser

Steel

Paper

Paint

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Massacuits is a terminology used in the __________ industry.

Paint

Oil hydrogenation

Soap

Sugar

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Acrylonitrile is mainly used in the __________ industry.

Polymer

Printing

Dyeing

Photographic

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Most commonly used rubber vulcanising agent is

Sulphur

Bromine

Platinum

Alumina

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Blue colour is imparted to glass by the addition of

FeSO₄

PbO

CaO

NaOH

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Oils and fats are converted to soap in a process called

Hydrogenation

Esterification

Saponification

None of these

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Sea weeds are an important source of

Fluorine

Chlorine

Bromine

Iodine