The equilibrium $2 \mathrm{Cu}^{\mathrm{I}} \rightleftharpoons \mathrm{Cu}^0+\mathrm{Cu}^{\text {II }}$ in…
The equilibrium $2 \mathrm{Cu}^{\mathrm{I}} \rightleftharpoons \mathrm{Cu}^0+\mathrm{Cu}^{\text {II }}$ in aqueous medium at $25^{\circ} \mathrm{C}$ shifts towards the left in the presence of
$\mathrm{NO}_3^{-}$
$\mathrm{Cl}^{-}$
$\mathrm{SCN}^{-}$
$\mathrm{CN}^{-}$
Solution
$\mathrm{Cl}^{-}, \mathrm{CN}^{-}$and $\mathrm{SCN}^{-}$froms precipitate with $\mathrm{Cu}$ (I), remove $\mathrm{Cu}$ (I) ion from equilibrium and reaction shift in direction shift in backward direction according to Le-Chatelier's principle.