Mass Transfer
Which of the following adsorbant is used in the refinning of sugar?

Wood charcoal
Activated clay
Bone charcoal
Silica gel

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Mass Transfer
Steam distillation is not recommended to be used, if the

Material can not be distilled by indirect heating even under low pressure, because of the high boiling temperature
Material to be distilled is thermally unstable or has the tendency to react with other components associated with it, at the boiling temperature
Liquids decompose, if distilled directly at atmospheric pressure
Azeotropic mixture is to be separated and the final product is miscible with water

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Mass Transfer
For absorbing a sparingly soluble gas in a liquid

Gas side mass transfer co-efficient should be increased
Liquid side mass transfer co-efficient should be decreased
Mass transfer co-efficient must be kept constant
Liquid side mass transfer co-efficient should be increased

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Mass Transfer
In a counter-current liquid extractor

Liquid's flow rate depends upon the temperature and pressure
Only one of the liquids may be pumped at any desired rate
Both liquids flow at fixed rate
Both liquids can have any desired flow rate

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