Question

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)

• A. 6.00
• B. 6.0
• C. 6

Answer 1

Answer: (A), (B), (C)

$KMn{O}_4\left(\text{acidic medium}\right)+H_2{C}_2{O}_4\to C{O}_2+M{n}^{2+}$
$M{n}^{2+}$ has $5$ unpaired electrons
$\therefore$ Spin only magnetic moment

$=\sqrt{n(n+2)}$
$=\sqrt{5(5+2)}$
$=\sqrt{5\times 7}$
$=\sqrt{35}$
$=5.92B.M.$
$\approx 6B.M.\text{Nearest integer}$