Mass Transfer
Smoke is an example of

Solid dispersed in liquid
Solid dispersed in gas
Gas dispersed in liquid
Liquid dispersed in gas

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Mass Transfer
Solvent extraction is the terminology applied to the liquid-liquid extraction, which is preferred for the separation of the components of liquids, when

One of the liquid components has very high affinity towards the solvent
One of the liquid components is heat sensitive
Viscosity of liquid components is very high
Extracting solvent is cheaply & abundantly available

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Mass Transfer
Humid volume is the total volume in m³ of 1 kg of

Vapour laden gas at 1 atm. and room temperature
Vapour laden gas at 1 atm. and gas temperature
Gas plus its accompanying vapour at 1 atm. and room temperature
Gas plus its accompanying vapour at 1 atm. and gas temperature

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