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Q. Assume that during electrolysis of $AgNO _{3}$, only $H _{2} O$ is electrolysed and $O _{2}$ is formed as :-
$2 H _{2} O \rightarrow 4 H ^{+}+ O _{2}+4 e ^{-}$
$O _{2}$ formed at NTP due to passage of $2 A$ of current for $965\, s$ is :-

Solution:

$W _{ O _{2}}=\frac{ E _{ w }}{96500} \times It$