A) Na
B) Mg
C) Fe
D) Pt
Correct Answer: A
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. \[Na+{{C}_{2}}{{H}_{5}}OH\xrightarrow{{}}{{C}_{2}}{{H}_{5}}ONa+\frac{1}{2}{{H}_{2}}\uparrow \]
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