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STD 12 - 4. d and f- block elements — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - 4. d and f- block elements4 Marks
MCQ
Most stable cation in aqueous medium is
  • A
    $Cr^{2+}$
  • B
    $V^{3+}$
  • ✓
    $Cr^{3+}$
  • D
    $Mn^{2+}$
✓

Answer

Correct option: C.
$Cr^{3+}$
c
$Cr ^{3+}$ has a $3 d^3 4 s ^0$ configuration with an exactly half-filled $t_{2 g}^3$ is thus the most stable ion in the aqueous medium.

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