The difference in the 'spin-only' magnetic moment values of $ \text{KMnO}_4 $ and the manganese product formed during titration of $ \text{KMnO}_4 $ against oxalic acid in acidic medium is ______ BM (nearest integer).

Question

Statement-I : The correct increasing order of bond length among the following is $O_2^+ < O_2 < O_2^- < O_2^{2-}$.
Statement-II : The correct order of number of unpaired electrons is $O_2^{2-} < O_2^+ < O_2^- < O_2$.

Answer 1

Spin-only magnetic moment of Mn in KMnO$_4$:
\[\mu = 0\]
Spin-only magnetic moment of the manganese product from KMnO$_4$ titration with oxalic acid (acidic medium):
\[\mu = 6 \, \text{BM}\]
Magnetic moment difference:
\[6 - 0 = 6 \, \text{BM}\]

The difference in the 'spin-only' magnetic moment values of \( \text{KMnO}_4 \) and the manganese product formed during titration of \( \text{KMnO}_4 \) against oxalic acid in acidic medium is ______ BM (nearest integer).

Correct Answer: 6

Solution and Explanation

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