Verified Solution • 2025–26 Session moderate

QJEEAdv16Ch7921: JEE Advanced 2016 Chemistry - Class 12 JEEAdv16Ch7921 Solution: The geometries of the ammonia complexes of Ni 2+ , Pt 2+ and Zn …

The geometries of the ammonia complexes of Ni2+, Pt2+ and Zn2+, respectively, are

Multiple Choice Options

  • A octahedral, square planar and tetrahedral
  • B square planar, octahedral and tetrahedral
  • C tetrahedral, square planar and octahedral
  • D octahedral, tetrahedral and square planar

Step-by-Step Verified Solution

The hybridisation of central atoms and the geometries of ammonia complex are tabulated as follows:

 Metal Ion amp; Hybridisation amp; Coordination Number amp; Complex with NH3amp; Geometry Ni2+:[Ar]3d84s2amp;d2sp3amp;6amp;[Ni(NH3)6]2+amp; Octahedral Pt2+:[Xe]4f45d96s1amp;dsp2amp;4amp;[Pt(NH3)4]2+amp; Square planar Zn2+:[Ar]3d104s2amp;sp3amp;4amp;[Zn(NH3)4]2+amp; Tetrahedral \begin{array}{|l|c|c|c|l|}\hline \text { Metal Ion } & \text { Hybridisation } & \text { Coordination Number } & \text { Complex with } \mathbf{N H}_3 & \text { Geometry } \\\hline \mathrm{Ni}^{2+}:[\mathrm{Ar}] 3 d^8 4 s^2 & d^2 s p^3 & 6 & {\left[\mathrm{Ni}\left(\mathrm{NH}_3\right)_6\right]^{2+}} & \text { Octahedral } \\\hline \mathrm{Pt}^{2+}:[\mathrm{Xe}] 4 f^4 5 d^9 6 s^1 & d s p^2 & 4 & {\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_4\right]^{2+}} & \text { Square planar } \\\hline \mathrm{Zn}^{2+}:[\mathrm{Ar}] 3 d^{10} 4 s^2 & s p^3 & 4 & {\left[\mathrm{Zn}\left(\mathrm{NH}_3\right)_4\right]^{2+}} & \text { Tetrahedral } \\\hline\end{array}

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