MCQ
Which of the following complex shows ionization isomerism
- A$[Cr(NH_3)_6]Cl_3$
- B$[Cr(en)_2 ]Cl_2$
- C$[Cr(en)_3]Cl_3$
- ✓$[Co(NH_3)_5Br]SO_4$
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($A$) $\left[\mathrm{Pt}(\mathrm{en})(\mathrm{SCN})_2\right]$
($B$) $\left[\mathrm{Zn}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right]$
($C$) $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_4\right]$
($D$) $\left[\mathrm{Cr}(\mathrm{en})_2\left(\mathrm{H}_2 \mathrm{O}\right)\left(\mathrm{SO}_4\right)\right]^{+}$
$X$ and $Y$ are

| List$-I$ | List$-II$ | ||
| $(P)$ | $[Cr(NH_3)_4Cl_2]Cl$ | $(1)$ | Paramagnetic and exhibits ionisation isomerism |
| $(Q)$ | $[Ti(H_2O)_5Cl](NO_3)_2$ | $(2)$ | Diamagnetic and exhibits cis-trans isomerism |
| $(R)$ | $[Pt(en)(NH_3)Cl]NO_3$ | $(3)$ | Paramagnetic and exhibits cis-trans isomerism |
| $(S)$ | $[Co(NH_3)_4(NO_3)_2]NO_3$ | $(4)$ | Diamagnetic and exhibits ionisation isomerism |