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Q. Which of the following statements is correct about equivalent weight of $KMnO_4?$

The d-and f-Block Elements

Solution:

It is one-third of its molecular weight in alkaline medium because it gives 3 nascent oxygen in alkaline medium
$2KMnO_4+H_2O \xrightarrow{+3e^-} 2KOH + 2MnO_2 +3 [O]$
$\therefore $ Equivalent weight $=\frac{M}{3}$