During the electrolysis of carnallite,$MgCl_2$ is decomposed and not $KCl$. This is because of
- Alower decomposition voltage of $MgCl_2$ than that of $KCl$
- Breverse reaction $MgCl_2 + 2K \to Mg + 2KCl$ if $KCl$ is decomposed under other experimental conditions
- Cboth $(A)$ and $(B)$
- Dnone of the above
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