Chemical Process - Chemical Engineering Questions and Answers

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Which of the following is used as a coagulant in water treatment?

Chloramine

Chlorine

Ferrous sulphate

Hydrogen peroxide

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Coal tar is used as a

Binding material for coal briquettes

Fuel in rotary kiln

Binder in making carbon electrodes

All of the above

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The process involved in converting rubber into a thin sheet or coating it on fabric is called

Extrusion

Mastication

Calendering

Valcanisation

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Raw material used in alcohol distilleries in India is

Molasses

Benzol

Methylated spirit

None of these

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Fermentation of molasses to produce ethyl alcohol is done at __________ °C

20 - 30

< - 5

100 - 150

250 - 300

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The end bleaching agent used to move last traces of colour bodies from the pulp is

Chlorine dioxide (ClO₂)

MgO

SO₂ gas

Mercaptans

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Styrene-butadiene-rubber (SBR) as compared to natural rubber has

Poorer tensile strength

Poorer resistance to oxidation

Greater amount of heat build-up under heavy loading

All of the above

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Which of the following is an additional step in the manufacture of paper from bagasse as compared to that from bamboo?

Depithing

Digestion

Bleaching

None of these

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Black liquor is converted into white liquor by

Evaporation and burning the concentrate followed by causticisation of products

Multi-effect evaporation only

Selective liquid extraction

Extractive distillation