Among CrO,Cr_2O_3,and CrO_3,the sum of spin-o | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) $CrO$ is a basic oxide.$Cr_2O_3$ is an amphoteric oxide.In $CrO$,$Cr$ is in the $+2$ oxidation state $([Ar] 3d^4)$,so it has $4$ unpaired electron

Vedclass · Accepted Answer

$877$

Vedclass · Answer

(A) $CrO$ is a basic oxide.$Cr_2O_3$ is an amphoteric oxide.In $CrO$,$Cr$ is in the $+2$ oxidation state $([Ar] 3d^4)$,so it has $4$ unpaired electrons. The spin-only magnetic moment $\mu = \sqrt{n(n+2)} = \sqrt{4(4+2)} = \sqrt{24} \approx 4.90 \ BM$.In $Cr_2O_3$,$Cr$ is in the $+3$ oxidation state $([Ar] 3d^3)$,so it has $3$ unpaired electrons. The spin-only magnetic moment $\mu = \sqrt{3(3+2)} = \sqrt{15} \approx 3.87 \ BM$.The sum of the spin-only magnetic moments is $4.90 + 3.87 = 8.77 \ BM$.Expressed as $10^{-2} \ BM$,this is $877 	imes 10^{-2} \ BM$.

Among $CrO$,$Cr_2O_3$,and $CrO_3$,the sum of spin-only magnetic moment values of basic and amphoteric oxides is . . . . . . . . $10^{-2} \ BM$ (nearest integer).
(Given atomic number of $Cr$ is $24$)

Similar Questions

Stainless steel contains $..........$ $\%$ $Cr$.

Which of the following is used for making railway tracks?

The oxoanion which contains all equivalent $M-O$ bonds is:
$(I)$ $CrO_4^{2-}$
$(II)$ $MnO_4^-$
$(III)$ $Cr_2O_7^{2-}$

Which one of the following species is stable in aqueous solution?

Which of the following compounds is used as the starting material for the preparation of potassium dichromate?

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Among $CrO$,$Cr_2O_3$,and $CrO_3$,the sum of spin-only magnetic moment values of basic and amphoteric oxides is . . . . . . . . $10^{-2} \ BM$ (nearest integer).(Given atomic number of $Cr$ is $24$)