JEE Main 2024 Chemistry question
Match List-I with List-II. List-I (Complex ion): (A) [Cr(NH₃)₆]³⁺ (B) [NiCl₄]²⁻ (C) [CoF₆]³⁻ (D) [Ni(CN)₄]²⁻ List-II (Spin only magnetic moment in B.M.): (I) 4.90 (II) 3.87 (III) 0.0 (IV) 2.83 Choose the correct answer from the options given below:
Answer: (C)
Solution
Cr³⁺ (3 unpaired) 3.87; tetrahedral Ni²⁺ (2 unpaired) 2.83; high-spin Co³⁺ in [CoF₆]³⁻ (4 unpaired) 4.90; square planar [Ni(CN)₄]²⁻ 0.