Question

Match List I with List II

Choose the correct answer from the options given below :

• A. A-III, B-II, C-IV, D-I
• B. A-IV, B-I, C-II, D-III
• C. A-IV, B-III, C-I, D-II
• D. A-II, B-III, C-IV, D-I

Answer 1

The Correct Option is D

To solve this question, we need to match the complex ions from List I with their correct electronic configurations in List II.

We'll examine each complex ion and determine its electronic configuration based on the oxidation state of the central metal and the coordination chemistry.

1. A. \([\text{Cr}(\text{H}_2\text{O})_6]^{3+}\)
   • The oxidation state of Cr is +3.
   • Electronic configuration of Cr: \([\text{Ar}] 3d^5 4s^1\)
   • Cr³⁺ loses 3 electrons: \(3d^3\)
   • In octahedral complexes, the electron configuration is \(t_{2g}^3 e_g^0\).
   • So, this matches with II.
2. B. \([\text{Fe}(\text{H}_2\text{O})_6]^{3+}\)
   • The oxidation state of Fe is +3.
   • Electronic configuration of Fe: \([\text{Ar}] 3d^6 4s^2\)
   • Fe³⁺ loses 3 electrons: \(3d^5\)
   • In octahedral complexes, the electron configuration is \(t_{2g}^3 e_g^2\).
   • So, this matches with III.
3. C. \([\text{Ni}(\text{H}_2\text{O})_6]^{2+}\)
   • The oxidation state of Ni is +2.
   • Electronic configuration of Ni: \([\text{Ar}] 3d^8 4s^2\)
   • Ni²⁺ loses 2 electrons: \(3d^8\)
   • In octahedral complexes, the electron configuration is \(t_{2g}^6 e_g^2\).
   • So, this matches with IV.
4. D. \([\text{V}(\text{H}_2\text{O})_6]^{3+}\)
   • The oxidation state of V is +3.
   • Electronic configuration of V: \([\text{Ar}] 3d^3 4s^2\)
   • V³⁺ loses 3 electrons: \(3d^2\)
   • In octahedral complexes, the electron configuration is \(t_{2g}^2 e_g^0\).
   • So, this matches with I.

Based on the analysis, the correct matching is:

A-II, B-III, C-IV, D-I

Thus, the correct answer is:

A-II, B-III, C-IV, D-I

Answer 2

$[\text{Cr(H}_2\text{O)}_6]^{3+} \text{ contains } \text{Cr}^{3+}: [\text{Ar}]3d^3 \cdot t_{2g}^3 e_g^0$

$[\text{Fe(H}_2\text{O)}_6]^{3+} \text{ contains } \text{Fe}^{3+}: [\text{Ar}]3d^5 \cdot t_{2g}^3 e_g^2$

$[\text{Ni(H}_2\text{O)}_6]^{2+} \text{ contains } \text{Ni}^{2+}: [\text{Ar}]3d^8 \cdot t_{2g}^6 e_g^2$

$[\text{V(H}_2\text{O)}_6]^{3+} \text{ contains } \text{V}^{3+}: [\text{Ar}]3d^2 \cdot t_{2g}^2 e_g^0$