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(B) Sodium metal reacts vigorously with water to produce $NaOH$ and $H_2$ gas. Because of this high reactivity,sodium cannot be used as a general dryi

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Drying of benzene

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(B) Sodium metal reacts vigorously with water to produce $NaOH$ and $H_2$ gas. Because of this high reactivity,sodium cannot be used as a general drying agent for substances containing water or acidic protons. However,it is specifically used to remove traces of water from organic solvents like benzene or ether,as it reacts with the water content to form $NaOH$ and $H_2$,which can then be removed. Among the given options,drying of benzene is the standard application.

List-$I$	List-$II$
$(a)$ $Li$	$(i)$ photoelectric cell
$(b)$ $Na$	$(ii)$ absorbent of $CO_{2}$
$(c)$ $K$	$(iii)$ coolant in fast breeder nuclear reactor
$(d)$ $Cs$	$(iv)$ treatment of cancer
	$(v)$ bearings for motor engines

The reactivity of sodium metal with water is utilized in which of the following processes?

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