See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

             2 2 4 3 3 4 CuSO 4NH aq. Cu NH Blue, sp d, 3BM; paramagnetic                3 pH 7 2 3 2 2 3 2 6 CoCl KNO CH COOH Co NO yellow, diamagnetic, d sp , 0   2 3 2 4 4 CoCl NH SCN Co SCN blue, paramagnetic,