Match List-I with List-II and select the correct answer using the codes given below the lists :
List-I (Compound)
(A) [Ni(NH3)6]2+
(B) [PtCl4]2-
(C) [Ni(CO)4]
(D) [Co(ox)3]3-
List-II

Question

Match List-I with List-II and select the correct answer using the codes given below the lists :
List-I (Compound)
(A) [Ni(NH3)6]2+
(B) [PtCl4]2-
(C) [Ni(CO)4]
(D) [Co(ox)3]3-
List-II (Hyb. of Central atom)
(1) sp3
(2) sp3d2
(3) dsp2
(4) d2sp3

Prashant Kotian · Accepted Answer

Correct answer: A. Step 1: In [Co(NH3)6]Cl3, the cobalt is Co^3+, which has a 3d^6 configuration. Step 2: NH3 is a strong-field ligand that forces pairing, giving a low-spin t_2g^6 e_g^0 configuration. Step 3: The CFSE is calculated as: 6 * (-0.4 Δ_o) + 0 * (0.6 Δ_o) = -2.4 Δ_o, matching option (c).

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