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Q.
Metal used for drying organic solvent is :
AFMCAFMC 2001
Solution:
$Na$ is used to dry organic solvents as it readily react with the moisture $ (H_{2}O) $ present in it but does not react with organic solvent. However it is not used for drying ethanol as it reacts with ethanol.
$ Na+C_{2}H_{5}OH\rightarrow C_{2}H_{5} ONa+\frac{1}{2}H_{2}\uparrow $