Which of the following are paramagnetic? A. [ NiCl ₄ ]²⁻ B. Ni ( CO )₄ C. [ Ni ( CN )₄ ]²⁻ D. [ Ni ( H ₂ O )₆ ]²⁺ E. Ni ( PPh ₃ )₄ Choose the correct answer from the options given below :

Step-by-step solution

(A) [ NiCl ₄ ]²⁻ Oxidation state =+2 Electronic configuration =3 d^8 4 s^0 Cl = W.F.L. No Pairing (D) [ Ni ( H ₂ O )₆ ]²⁺ Oxidation state =+2 , configuration =3 ~d ^8 H ₂ O is W.F.L. No pairing Hence both are paramagnetic.