Q57 / 180 · AIIMS 2019 (26 May) · Chemistry

Which of the following complex is optically inactive?

  • Correct answer
    A
    $\left[\mathrm{RhCl}(\mathrm{CO})\left(\mathrm{PPh}_3\right)\left(\mathrm{NH}_3\right)\right]$
  • B
    $\left[\mathrm{Fe}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}$
  • C
    $\left[\mathrm{Fe}(e n)_2 \mathrm{Cl}_2\right]$
  • D
    $\left[\operatorname{Pd}(e n)_2 \mathrm{Cl}_2\right]$

Solution

$\left[\operatorname{RhCl}(\mathrm{CO})\left(\mathrm{PPh}_3\right)\left(\mathrm{NH}_3\right)\right]$ is optically inactive as it is square planar complex. It has plane of symmetry.

Hence, the correct answer is option: 'A'.

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