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  4. Acidified potassium permanganate solution oxidises oxalic acid. The spin-only magnetic moment of the manganese product formed from the above reaction is B.M. (Nearest Integer)

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Q. Acidified potassium permanganate solution oxidises oxalic acid. The spin-only magnetic moment of the manganese product formed from the above reaction is ______ B.M. (Nearest Integer)

JEE MainJEE Main 2022The d-and f-Block Elements

Solution:

$2 KMnO _{4}+5 H _{2} C _{2} O _{4}+3 H _{2} SO _{4} \rightarrow K _{2} SO _{4} $
$+2 MnSO _{4}+10 CO _{2}+8 H _{2} O$
$Mn ^{2+}$ has $5$ unpaired electrons therefore the magnetic moment is $\sqrt{35} BM$