JEE Main 2025 Chemistry question
The correct decreasing order of spin only magnetic moment values (BM) of Cu, Cu, Cr and Cr ions is :
Answer: (4)
Solution
Cu⁺(3d¹⁰)=0 BM, Cu²⁺(3d⁹)=1.73 BM, Cr²⁺(3d⁴)=4.89 BM, Cr³⁺(3d³)=3.87 BM. Order: Cr²⁺>Cr³⁺>Cu²⁺>Cu⁺.