[આપેલ : $1\,F =96500\,C\,mol ^{-1},$ $Fe$નું પરમાણ્વીય દળ $= 56\,g\,mol ^{-1}$ ]
\(3 F \longrightarrow 1\) mole \(Fe\) is deposited
For \(56\, g \longrightarrow 3 \times 96500\) (required charge)
For \(1 \,g \longrightarrow \frac{3 \times 96500}{56}\) (required charge)
For \(0.3482\, g \longrightarrow \frac{3 \times 96500}{56} \times 0.3482\)
\(Q =i\,t\)
\(1800.06=1.5 \,t\)
\(t =20\, min\)
$F{e^2}+ \left( {aq} \right) + A{g^ + }\left( {aq} \right) \to F{e^{3 + }}\left( {aq} \right) + Ag\left( s \right)$
$E_{Ag^+/Ag}^o = xV$, $E_{F{e^{2 + }}/Fe}^o = yV$, $E_{F{e^{3 + }}/Fe}^o = zV$