Chemical Process - Chemical Engineering Questions and Answers

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High temperature carbonisation of coal takes place at __________ °C.

2000

700

1100

< 500

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White phosphorous is stored under water, because

it does not react with water.

it is poisonous.

its kindling temperature in dry air is very low.

it is unstable.

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__________ is not a constituent of gun powder.

Carbon

Charcoal

Sulphur

Potassium nitrate

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Hydrophilic group of a soap or detergent solution is

water hating

soil loving

water loving

none of these

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Rotary kiln is not involved in the production of

cement

lime from limestone

slaked lime from quick lime

none of these

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Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is __________ °C.

60-70

150-200

250-300

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Vanillin is a type of

anti-pyretic drug

food preservative

flavour

dye

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Temporary hardness of water can be removed by

addition of alum (a coagulant).

boiling.

filtration (through gravity sand filter).

addition of lime.

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More than 100 percent of __________ is present in oleum.

SO₃

H₂SO₄

H₂SO₃

SO₂