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AIPMT PRELIMS2007Chemistry-Transition Elements

AIPMT PRELIMS 2007 Chemistry Oxidation States MCQ Question

Type: MCQ-conceptual-Medium-Class 12

Which one of the following ions is the most stable in aqueous solution?

A

$\text{V}^{3+}$

B

$\text{Ti}^{3+}$

C

$\text{Mn}^{3+}$

D

$\text{Cr}^{3+}$

Correct Answer

Option D

Detailed Explanation

Chromium in the +3 oxidation state has a half-filled t₂g orbital configuration, which is energetically stable due to exchange energy and symmetry.

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