Mass Transfer
For a distillation column operating at minimum reflux, the

None of these
Reflux ratio will be maximum
Concentration of liquid and vapour leaving a plate will be same
Number of plates required will be maximum

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Mass Transfer
When the solvent dissolves very little of solute, then

Large quantity of solvent is required to extract the solute
Solvent of low freezing point should be used
Solvent of low latent heat of vaporisation should be used
Very small quantity of solvent is required

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