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  4. The magnetic moment of a salt containing Zn 2+ ion is

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Q. The magnetic moment of a salt containing $Zn ^{2+}$ ion is

VITEEEVITEEE 2008

Solution:

Magnetic moment of $Zn ^{2+} \mu_{\text {effective }}$ $=\sqrt{n(n+2)} BM$
where, $n=$ Number of unpaired electrons
${ }_{30} Zn =1 s^{2}, 2 s ^{2} 2 p^{6}, 3 s^{2} 3 p^{6} 3 d^{10}, 4 s^{2}$
$Zn ^{2+}=1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{2} 3 p^{6} 3 d^{10}$
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So, magnetic moment of $Zn ^{2+}=$ zero