Q. The geometries of the ammonia complexes of $Ni^{2 +},Pt^{2 +}$ and $Zn^{2 +}$ , respectively, are

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octahedral, square planar and tetrahedral

square planar, octahedral and tetrahedral

tetrahedral, square planar and octahedral

octahedral, tetrahedral and square planar

Solution:

$\left[\right.Ni\left(\right.NH_{3}\left(\left.\right)_{6}\left(\left]\right.\right)^{2 +}=$ octahedral
$\left[\right.Pt\left(\right.NH_{3}\left(\left.\right)_{4}\left(\left]\right.\right)^{2 +}=$ square planar
$\left[\right.Zn\left(\right.NH_{3}\left(\left.\right)_{4}\left(\left]\right.\right)^{2 +}=$ tetrahedral

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