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JEE Mains · Chemistry · STD 12 - 4. d and f- block elements

Given below are two statements:
Statement I: The number of pairs among \([\text{Ti}^{4+}, \text{V}^{2+}]\), \([\text{V}^{2+}, \text{Mn}^{2+}]\), \([\text{Mn}^{2+}, \text{Fe}^{3+}]\) and \([\text{V}^{2+}, \text{Cr}^{2+}]\) in which both ions are coloured is \(3\).
Statement II: The number of pairs among \([\text{La}^{3+}, \text{Yb}^{2+}]\), \([\text{Lu}^{3+}, \text{Ce}^{4+}]\) and \([\text{Ac}^{3+}, \text{Lr}^{3+}]\) ions in which both are diamagnetic is \(3\).
In the light of the above statements, choose the correct from the options given below:

  1. A Both Statement I and Statement II are correct
  2. B Both Statement I and Statement II are incorrect
  3. C Statement I is correct but Statement II is incorrect
  4. D Statement I is incorrect but Statement II is correct
Verified Solution

Answer & Solution

Correct Answer

(A) Both Statement I and Statement II are correct

Step-by-step Solution

Detailed explanation

For Statement I: The electronic configurations of the given transition metal ions are: \(\text{Ti}^{4+} : 3d^0\) (colourless due to absence of unpaired electrons) \(\text{V}^{2+} : 3d^3\) (coloured) \(\text{Mn}^{2+} : 3d^5\) (coloured) \(\text{Fe}^{3+} : 3d^5\) (coloured)…
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