Chemical and Ionic Equilibrium - Result Question 31
####31. The equilibrium $2 Cu^{I} \rightleftharpoons Cu^{0}+Cu^{II}$ in aqueous medium at $25^{\circ} C$ shifts towards the left in the presence of
(2011)
(a) $NO _3^{-}$
(b) $Cl^{-}$
(c) $SCN^{-}$
(d) $CN^{-}$
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Solution:
- $Cl^{-}, CN^{-}$and $SCN^{-}$forms precipitate with $Cu(I)$, remove $Cu$ (I) ion from equilibrium and reaction shifts in backward direction according to Le-Chatelier’s principle.
