Question:

Out of Ti3+, Cr3+, Fe2+ and Ni2+ ions, the one which is the most stable ion in aqueous solution is:

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Half-filled and fully filled d-orbital configurations offer extra stability in transition metal ions.
Updated On: Jun 24, 2025
  • Ti3+
  • Cr3+
  • Fe2+
  • Ni2+
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The Correct Option is B

Solution and Explanation

Cr3+ (3d3) has a half-filled t2g configuration in an octahedral field, which imparts exceptional stability due to symmetrical distribution and exchange energy. Hence, Cr3+ is the most stable in aqueous medium.
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