Chemical Process - Chemical Engineering Questions and Answers

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__________ glass is used for the manufacture of optical glass.

Pyrex

Soda

Flint

Crooke's

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Thermosetting plastic materials

can be repeatedly melted.

is useful for melt casting.

can not be melted after forming.

is useful for spinning.

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Favourable conditions for the liquefaction of gases in general are

high pressure & low temperature.

low pressure & high temperature.

high pressure & high temperature.

low pressure & low temperature.

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In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed :

furnace → converter → absorber

furnace → evaporator → absorber

furnace → converter → evaporator

converter → furnace → absorber

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__________ nature of hypo (sodium thiosulphate) makes it useful in photography.

Oxidising

Reducing

Complex forming

Photochemical

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__________ is an ore of lead.

Quartz

Galena

Siderite

Chalcopyrite

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Which of the following is an yellow pigment ?

Titanium dioxide

Ferrous sulphate

Lead chromates

Zinc sulphides

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Catalytic oxidation of toluene produces

styrene

phenol

benzene

tri-nitro-toluene

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SO₂ is bubbled through hot sugar cane juice to

act as an acidifying agent.

increase its concentration.

increase the amount of molasses.

increase the crystal size.