Question
Pick out the correct statement.
Options:
A .  In case of liquid-liquid extraction, no separation is possible, if the selectivity of the solvent used is unity
B .  With increase in temperature, the selectivity of the solvent used in solvent extraction decreases
C .  The selectivity of solvent used in solvent extraction is unity at the plait point
D .  All of the above
Answer: Option D

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