MediumNEET 2025 Paper
+4 / -1
Which of the following are paramagnetic? A. [NiCl₄]²⁻ B. Ni(CO)₄ C. [Ni(CN)₄]²⁻ D. [Ni(H₂O)₆]²⁺ E. Ni(PPh₃)₄
A
A and C only
B
B and E only
C
A and D only
D
A, D and E only
Explanation
Ni²⁺ complexes with weak field ligands (Cl⁻, H₂O) → unpaired electrons → paramagnetic; CN⁻ and CO strong field → diamagnetic.
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