JEE Main 2024 Chemistry question
Consider the following reaction: MnO + KOH + O → A + HO. Product 'A' in neutral or acidic medium disproportionate to give products 'B' and 'C' along with water. The sum of spin-only magnetic moment values of B and C is BM. (nearest integer) (Given atomic number of Mn is 25)
Answer: 4
Solution
A = K₂MnO₄, which gives KMnO₄ (d⁰, 0 BM) and MnO₂ (d³, √15 = 3.87 BM); the sum is about 4 BM.