Among (CrO, Cr_2 O_3) and (CrO_3), the sum of spin-only magnetic...

Among (\mathrm{CrO}, \mathrm{Cr}_2 \mathrm{O}_3) and (\mathrm{CrO}_3), the sum of spin-only magnetic moment values of basic and amphoteric oxides is _______ (10^{-2} \mathrm{BM}) (nearest integer). (Given atomic number of (\mathrm{Cr}) is 24)

Correct answer

Step-by-step solution

CrO Basic oxide

\mathrm{Cr}_2 \mathrm{O}_3

Amphoteric oxide In

\mathrm{CrO}, \mathrm{Cr}

exist as

\mathrm{Cr}^{+2}

and have

\mu

\mathrm{Cr}_2 \mathrm{O}_3, \mathrm{Cr}

exist as

\mathrm{Cr}^{+3}

and have

\mu

only

=3.87

Sum of spin only magnetic moment

\begin{aligned} & =4.90+3.87=8.77 \\ & \mu_{\text{only }}=877 \times 10^{-2} \end{aligned}

Ans. 877

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