Question

Match the List-I (complexes) with List-II (Hybridisation/magnetic behavi

List-I (Complexes)	List-II (Hybridisation/magnetic behavi
(P) [Co(NH3)6]3+	(1) Paramagnetic
(Q) [NiCl4]2-	(2) Dlamagnetic
(R) [Ni(CN)4]2-	(3) sp³
(S) [CoF6]3-	(4) dsp²
	(5) d²sp³

• A. (P) → (2, 5); (Q) → (1, 3); (R) → (2, 4); (S) → (1)
• B. (P) → (1, 3); (Q) → (2, 5); (R) → (2, 4); (S) → (1,5)
• C. (P) → (2, 5); (Q) → (2, 4); (R) → (1, 3); (S) → (1, 3)
• D. (P) → (1, 3); (Q) → (2, 4); (R) → (1, 5); (S) → (2,5)

Answer 1

Answer: (A)

A. (P) → (2, 5); (Q) → (1, 3); (R) → (2, 4); (S) → (1)

Answer 2

1. Oxidation States and d-electron Configuration:

   • (P) [Co(NH₃)₆]³⁺: Co³⁺ (d⁶)
   • (Q) [NiCl₄]²⁻: Ni²⁺ (d⁸)
   • (R) [Ni(CN)₄]²⁻: Ni²⁺ (d⁸)
   • (S) [CoF₆]³⁻: Co³⁺ (d⁶)

2. Ligand Strength, Hybridization, and Magnetic Behavior:

   • (P) [Co(NH₃)₆]³⁺: NH₃ (strong ligand) → d²sp³ hybridization, diamagnetic (d⁶ pairs up). Matches (2) and (5).
   • (Q) [NiCl₄]²⁻: Cl⁻ (weak ligand) → sp³ hybridization, paramagnetic (d⁸ has unpaired electrons). Matches (1) and (3).
   • (R) [Ni(CN)₄]²⁻: CN⁻ (strong ligand) → dsp² hybridization, diamagnetic (d⁸ pairs up). Matches (2) and (4).
   • (S) [CoF₆]³⁻: F⁻ (weak ligand) → sp³d² hybridization, paramagnetic (d⁶ has unpaired electrons). Matches (1).

3. Final Matches:

   • (P) → (2, 5)
   • (Q) → (1, 3)
   • (R) → (2, 4)
   • (S) → (1)

   This corresponds to Option A.