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AIIMS 2017
Exam
AIIMS
Year
2017
Subject
Chemistry
Chapter
Coordination Compounds

AIIMS 2017 · Chemistry · Coordination Compounds

Among the following, the compound that is both paramagnetic and...

Among the following, the compound that is both paramagnetic and coloured is

Options

  1. AK2Cr2O7\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7
  2. B(NH4)2[TiCl6]\left(\mathrm{NH}_4\right)_2\left[\mathrm{TiCl}_6\right]
  3. CVOSO4\mathrm{VOSO}_4
  4. DK3[Cu(CN)4]\mathrm{K}_3\left[\mathrm{Cu}(\mathrm{CN})_4\right]

Correct answer

C. VOSO4\mathrm{VOSO}_4

Step-by-step solution

K2Cr2O7→Cr+6:3d0(NH4)2[TiCl6]→Ti+4:3d0VOSO4→V+4:3d1 K3[Cu(CN)4]→Cu+:3d10\begin{aligned} & \mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7 \rightarrow \mathrm{Cr}^{+6}: 3 d^0 \\ & \left(\mathrm{NH}_4\right)_2\left[\mathrm{TiCl}_6\right] \rightarrow \mathrm{Ti}^{+4}: 3 d^0 \\ & \mathrm{VOSO}_4 \rightarrow \mathrm{V}^{+4}: 3 d^1 \\ & \mathrm{~K}_3\left[\mathrm{Cu}(\mathrm{CN})_4\right] \rightarrow \mathrm{Cu}^{+}: 3 d^{10}\end{aligned}\mathrm{VOSO}_4$, due to the presence of one unpaired electron, is paramagnetic and coloured.
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