Q. Select the correct statement set?
$\left(\right.1\left.\right)$ Bis-(glycinato) Zinc (II) is optically active
$\left(\right.2\left.\right)$ $\left[\right.NiCl_{4}\left]\right.^{2 -}$ and $\left[\right.PtCl_{4}\left]\right.^{2 -}$ differ in shapes
$\left(\right.3\left.\right)$ $\left[\right.Ni\left(\right.CN\left(\left.\right)_{4}\left(\left]\right.\right)^{2 -}$ and $\left[\right.Ni\left(\right.CO\left(\left.\right)_{4}\left]\right.$ have same magnetic moment
$\left(4\right) \, \text{Cis-} \left[\text{Co} \left(\right. \left(\text{NH}\right)_{3} \left.\right)_{2} \left(\text{en}\right)_{2}\right]$ cannot show optical activity

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A

1, 2

B

1, 3

C

1, 2, 3

D

1, 3, 4

Solution:

Here statement 1, 2 and 3 are correct while 4 is incorrect.
(1) Bis-(glycinato) Zinc (II) is optically active
(2) $\left[\right.NiCl_{4}\left]\right.^{2 -}$ and $\left[\right.PtCl_{4}\left]\right.^{2 -}$ differ in shapes i.e. tetrahedral and square planar respectively
(3) $\left[\right.Ni\left(\right.CN\left(\left.\right)_{4}\left(\left]\right.\right)^{2 -}$ and $\left[\right.Ni\left(\right.CO\left(\left.\right)_{4}\left]\right.$ have zero magnetic moment
(4) As cis- $\left[\right.Co\left(\right.NH_{3}\left(\left.\right)_{2}\left(\right.en\left(\left.\right)_{2}\left]\right.$ can show optical activity.

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