First slide

Electrolysis

Question

Molten CuCl₂ is electrolysed using platinum electrode. The reaction occuring at anode is

Easy

A

$\large 2C{l^ - }\, \to \,C{l_{2\left( g \right)}}\, + \,2{e^ - }$
B

$C{l_{2\left( g \right)}}\, + \,2{e^ - }\, \to \,2C{l^ - }$
C

$C{u^{2 + }} + \,2{e^ - }\, \to \,C{u_{\left( s \right)}}$
D

$C{u_{\left( s \right)\,}} \to \,C{u^{2 + }} + 2{e^ - }$

Solution

Pt acts as inert electrode.
At Cathode
$C{u^{ + 2}} + 2{e^ - } \rightleftharpoons Cu$
At anode
$2C{l^ - } - 2{e^ - } \rightleftharpoons C{l_2}$

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