MCQ
During electrolysis, the species discharged at cathode are
- AIons
- ✓Cation
- CAnion
- DAll of these
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$Zn\,(s)\,\, + \,\,C{u^{2 + }}\,(aq)\, \rightleftharpoons \,Z{n^{2 + \,}}\,(aq)\, + Cu\,(s)$
At $300\,K$ is approximately $(R = 8 \,JK^{-1}\,mol^{-1},\, F = 96000\,C\,mol^{-1})$

$I_2 + 2e^-\to 2I^-$ ; $E^o = 0.54 \,V$
$MnO_4^-+ 8H^+ + 5e^-\to Mn^{2+} + 4H_2O$ ; $E^o = 1.52\, V$
$Fe^{3+} + e^-\to Fe^{2+}$ ; $E^o = 0.77\, V$
$Sn^{4+} + 2e^-\to Sn^{2+}$ ; $E^o = 0.1\, V$
The strongest reducant and oxidant respectively are :