Mass Transfer
At minimum reflux ratio for a given separation

Number of plates is zero
Separation is most efficient
Number of plates is infinity
Minimum number of the theoretical plates is required

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Mass Transfer
Which of the following psychrometric processes is followed by water vapour laden unsaturated air, when it is passed through solid or liquid adsorbent?

Dehumidification with dry bulb temperature remaining constant
Heating and dehumidification at almost constant wet bulb temperature
Cooling and dehumidification
None of these

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