Among $N a$ , $H g$ , $S$ , $P t$ , and graphite which can be used as electrodes in electrolytic cell having aqueous solutions ?

N a

and

S

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H g

P t

, and

S

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N a

H g

, and

S

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H g

P t

, and graphite

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Solution

The correct option is D $H g$ , $P t$ , and graphite
$H g, P t$ and graphite are inert to reaction with $H_{2} O$ while $S$ can react with $H_{2} O$ .
So, $H g, P t, C$ can be used as electrode in electrolytic cell.

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