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Q. $n$-Factor of $KMnO _{4}$ in neutral medium is

The d-and f-Block Elements

Solution:

$KMnO _{4}$ is neutral medium
$\underset{+7}{KMnO _{4}}+2 H _{2} O \longrightarrow \underset{+4}{MnO _{2}}$
$\Rightarrow $ n-factor $=7-4=3$