Which will give a white precipitate with $\mathrm{AgNO}_{3}$ in aqueous solution

Which will give a white precipitate with $\mathrm{AgNO}_{3}$ in aqueous solution
  1. $\left[\mathrm{Co}\left(\mathrm{NH}_{3}ight)_{5} \mathrm{Cl}ight]\left(\mathrm{NO}_{2}ight)_{2}$
  2. $\left[\mathrm{Pt}\left(\mathrm{NH}_{3}ight)_{6}ight] \mathrm{Cl}_{4}$
  3. $\left[\mathrm{Pt}(\mathrm{en}) \mathrm{Cl}_{2}ight]$
  4. $\left[\mathrm{Cu}\left(\mathrm{NH}_{3}ight)_{4}ight] \mathrm{SO}_{4}$

Solution

$\left[\mathrm{Pt}\left(\mathrm{NH}_{3}ight)_{6}ight] \mathrm{Cl}_{4} ightleftharpoons\left[\mathrm{Pt}\left(\mathrm{NH}_{3}ight)_{6}ight]^{4+}+4 \mathrm{Cl}^{-}$
$\mathrm{Ag}^{+}+\mathrm{Cl}^{-} \longrightarrow \mathrm{AgCl}(\mathrm{ppt})$

Asked in: JEE-TOPICTESTS-CHEMISTRY

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