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Mass Transfer

Mass Transfer
Which of the following adsorbent is used to decolourise yellow glycerine?

Fuller
Silica gel
Activated carbon
Alumina

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Mass Transfer
If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is

< 1
> 1
1

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Mass Transfer
The main reason for dividing a tall packed tower into series of small towers is to

Avoid flooding
Avoid channeling
Minimise the overall pressure drop
Reduce liquid hold up

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Mass Transfer
Radioactive nuclear waste is treated in

Mixer-settler extractor
Rotating-disc contactor
Pulsed column extractor
Bollman extractor

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Mass Transfer
Minimum possible diameter of a packed coloumn is decided mainly by the

Flooding
Liquid density
Gas viscosity
Liquid hold up

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Mass Transfer
Heat in BTU necessary to increase the temperature of 1 lb of gas and its accompanying vapour by 1°F is called the

Humid heat
Sensible heat
Latent heat
Specific heat

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