Choose the correct magnetic moment of $C l_{2} O_{6}$ and $C l O_{3}$ .

C l_{2} O_{6}

- Zero

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C l O_{3} - \sqrt{5}

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C l_{2} O_{6} - \sqrt{3}

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C l O_{3} - \sqrt{3}

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None of the above

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Solution

The correct options are
A $C l_{2} O_{6}$ - Zero
B $C l O_{3} - \sqrt{3}$
(a) Zero BM ( no unpaired electron).
Oxidation state of Cl in $C l_{2} O_{6}$ is $+ 7$ . The confugartion of $C l^{7 +}$ is $1 s^{2} 2 s^{2} 2 p^{6}$ .
(b) $\sqrt{3}$ BM ( with one unpaired electron)
Oxidation state of $C l$ in $C l O_{3}$ is $+ 6$ . The confugartion of $C l^{6 +}$ is $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}$ .
So the magnetic moment will be $\sqrt{3}$ .

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