Verified Solution • 2025–26 Session moderate

QJEEM22Ch60cc: JEE Main 2022 Chemistry - Class 12 JEEM22Ch60cc Solution: Acidified potassium permanganate solution oxidises oxalic acid. …

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)

Step-by-Step Verified Solution

KMnO4\mathrm{KMnO}_{4} (acidic medium) +H2C2O4→CO2+Mn+2+\mathrm{H}_{2} \mathrm{C}_{2} \mathrm{O}_{4} \rightarrow \mathrm{CO}_{2}+\mathrm{Mn}^{+2}

Mn+2\mathrm{Mn}^{+2} has 5 unpaired electrons

∴\therefore Spin only magnetic moment =5(5+2)=\sqrt{5(5+2)}

=5×7=35≃5.92 B.M. ≃6 B.M. 

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