Mass Transfer
In case of constant underflow extraction operation, the __________ at all solute concentration.

Neither A nor B
Both A & B
Ratio of the insoluble to solution is constant
Solids are drained to the same extent

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Mass Transfer
Unsaturated air (with dry bulb temperature and dew point being 35°C and 18°C respectively) is passed through a water spray chamber maintained at 15°C. The air will be cooled

And dehumidified with increase in wet bulb temperature
At the same relative humidity
And humidified
And dehumidified with decrease in wet bulb temperature

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