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D and F Block Elements question

2007 · Q70
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D and F Block Elements question

2007 · Q70

NEETChemistryD and F Block ElementsMCQ+4 / −1
Which one of the following ions is the most stable in aqueous solution?
(At. No. Ti = 22, V = 23, Cr = 24, Mn = 25)
  1. A
    V3+
  2. B
    Ti3+
  3. C
    Mn3+
  4. D
    Cr3+
View written solutionFree

Correct answer: C

The exactly half-filled and completely filled d-orbital have extra stability and stability is directly proportional to number of unpaired electrons.

Mn+3 (22) = 3d44s0 (4 unpaired electrons)

So, Mn3+ ion is most stable in aqueous solution. Rest all have less number of unpaired electrons.

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