Question

Which one of the following ions is the most stable in aqueous solution?
(At. No. \(T_{1}=22, V=23, C r=24, M n=25\) )
(a) \(\mathrm{V}^{3+}\)
(b) \(\mathrm{Ti}^{3-}\)
(c) \(\mathrm{Mn}^{3-}\)
(d) \(\mathrm{Cr}^{3-}\)

Answer 1

Correct option (d) \(\mathrm{Cr}^{3+}\)
Explanation:
\(-4\) is the most stable oxidation state of vanadium and titanium. \(\mathrm{Mn}^{3+}\) is not stable. \(\mathrm{Mn}^{2+}\), rather than \(\mathrm{Mn}^{3+}\) is much more stable in aqueous solution. For chromium \(_{1}+3\) oxidation state is most stable in aqueous solution.

Answer 2

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