(B) The electronic configuration of $Cr^{3+}$ is $[Ar] 3d^3$.In an octahedral field,the $d$-orbitals split into $t_{2g}$ and $e_g$ sets.For $Cr^{3+}$,

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(B) The electronic configuration of $Cr^{3+}$ is $[Ar] 3d^3$.In an octahedral field,the $d$-orbitals split into $t_{2g}$ and $e_g$ sets.For $Cr^{3+}$,the three electrons occupy the $t_{2g}$ orbitals,resulting in a half-filled $t_{2g}^3$ configuration,which provides extra stability in aqueous solution.

Class 11 Chemistry Data Entry - Chemistry Level 0 of all question bank

Which one of the following ions is the most stable in aqueous solution? (At. No. $Ti = 22, V = 23, Cr = 24, Mn = 25$)

AIPMT 2007 All AIPMT

A
$Mn^{3+}$
B
$Cr^{3+}$
C
$V^{3+}$
D
$Ti^{3+}$

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