Question

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

• A. 0
• B. 1.87
• C. 5.92
• D. 2

Answer 1

Answer: (A)

0

Answer 2

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

So, magnetic moment of $Zn ^{2+}=$ zero