JEE Main 2024 Chemistry question
The spin only magnetic moment value of the ion among Ti, V, Co and Cr, that acts as strong oxidising agent in aqueous solution is ……….. BM (Near integer). (Given atomic numbers: Ti: 22, V: 23, Cr: 24, Co: 27)
Answer: 5
Solution
Co³⁺ (E° = +1.97 V) is the strong oxidising agent; as a high-spin d⁶ ion in water it has four unpaired electrons: √24 = 4.9 ≈ 5 BM.