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Q.
During the electrolysis of $AgNO _3$, the volume of $O _2$ formed at STP due to passage of $2 A$ of current for $965\, s$ is
Electrochemistry
Solution:
Number of Faradays $=\frac{I t}{96500}=\frac{2 \times 965}{96500}=0.02$
Anode: $2 H _2 O ( l ) \rightarrow O _2( g )+4 H ^{\oplus}( aq )+4 e^{-}$
$\Rightarrow 4 F$ electricity $=1 mol O _2 \equiv 22.4 L O _2$ at STP
$\Rightarrow 0.02 F$ electricity $=22.4 \times \frac{0.02}{4}$
$=0.112 L O _2$ at STP