Coordination Compounds Ques 47
47. A magnetic moment of $1.73 $ $\mathrm{BM}$ will be shown by one among the following:
[NEET 2013]
(a) $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$
(b) $\left[\mathrm{TiCl}_4\right]$
(c) $\left[\mathrm{CoCl}_6\right]^{4-}$
(d) $\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]^{2+}$
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Answer:
Correct Answer: 47.(d)
Solution: (d) $\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]^{2+}$ hybridisation $d s p^2$
$\mathrm{Cu}^{+2}-3 d^9$ has one unpaired $\mathrm{e}^{-}$
So, magnetic moment
$ \begin{aligned} \mu & =\sqrt{n(n+2)}=\sqrt{1(1+2)} \ & =\sqrt{3}=1.73 \end{aligned} $
BETA
