Question

A metal complex having composition $\mathrm{Cr}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2 \mathrm{Br}$ has been isolated in two forms $\mathrm{A}$ and $B . A$ reacts with $\mathrm{AgNO}_3$ producing a white precipitate which was soluble in dilute ammonia solution. $B$ reacts with $\mathrm{AgNO}_3$ producing a pale yellow precipitate soluble in concentrated ammonia solution. The formulae of $A$ and $B$ are respectively

Accepted Answer

$\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_4 \mathrm{BrCl}\right] \mathrm{Cl} ;\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right] \mathrm{Br}$

Answer

$\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_4 \mathrm{Br}\right] \mathrm{Cl}_2 ;\left[\mathrm{Cr}\left(\mathrm{NH}_3\right) \mathrm{Cl}_2\right] \mathrm{Br}$

Answer

$\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_4 \mathrm{BrCl}\right] \mathrm{Cl} ;\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_3 \mathrm{Cl}_2 \mathrm{Br}\right] \mathrm{NH}_3$

Answer

$\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right] \mathrm{Br} ;\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_4 \mathrm{BrCl}\right] \mathrm{Cl}$

NEET UG CHEMISTRY MCQ: CO-ORDINATION COMPOUNDS

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