Mass Transfer
With increase in temperature, the leaching rate increases due to

Neither A nor B
Increased diffusivity
Decreased liquid viscosity
Both A & B

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

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
Large quantity of solvent is required to extract the solute

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