Among and the spin-only magnetic moment value of the species with least oxidizing ability is .......... B.M. (Nearest integer).

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Solution

Q.
Among ${VO}_{2}^{+}, {MnO}_{4}^{-}$ and ${Cr}_{2} O_{7}^{2 -}$ , the spin-only magnetic moment value of the species with least oxidizing ability is .......... B.M. (Nearest integer). (Given atomic number V = 23, Mn = 25, Cr = 24). [2024]

Ans.
(0)

Oxidizing ability of given oxoanions is

${VO}_{2}^{+} < {Cr}_{2} O_{7}^{2 -} < {MnO}_{4}^{-}$

This is due to increasing stability of lower species to which they are reduced.

Compound Electronic
configuration of
central metal ion Number
of unpaired
electrons (n) Spin only
magnetic
moment ( $μ$ ) = $\sqrt{n (n + 2)}$ BM

${VO}_{2}^{+}$ $V^{5 +} = {}_{18}{[Ar]} 3 d^{0} 4 s^{0}$ 0 0 BM

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