Among \(\mathrm{VO}_2^{+}, \mathrm{MnO}_4^{-}\)and \(\mathrm{Cr}_2 \mathrm{O}_7^{2-}\), the spin-only…
Among \(\mathrm{VO}_2^{+}, \mathrm{MnO}_4^{-}\)and \(\mathrm{Cr}_2 \mathrm{O}_7^{2-}\), the spin-only magnetic moment value of the species with least oxidising ability is ______ BM (Nearest integer).
(Given atomic member \(\mathrm{V}=23, \mathrm{Mn}=25, \mathrm{Cr}=24\))
Solution
For 3d transition series; Oxidising power : $\mathrm{V}^{+5} < \mathrm{Cr}^{+6} < \mathrm{Mn}^{+7}$
$\mathrm{V}^{+5}:[\mathrm{Ar}] 4 \mathrm{~s}^0 3 \mathrm{~d}^0$
Number of unpaired electron $=0$
$\mu=0$