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JEE Advanced 2011Paper 2
Exam
JEE Advanced
Year
2011
Paper
Paper 2
Subject
Chemistry
Chapter
Chemical Equilibrium

JEE Advanced 2011 · Paper 2 · Chemistry · Chemical Equilibrium

The equilibrium 2 Cu^ I leftharpoons Cu^0+Cu^ II in aqueous medium...

The equilibrium 2 \mathrm{Cu}^{\mathrm{I}} \rightleftharpoons \mathrm{Cu}^0+\mathrm{Cu}^{\text{II }} in aqueous medium at 25∘Cshiftstowardstheleftinthepresenceof25^{\circ} \mathrm{C} shifts towards the left in the presence of

Options

  1. ANO3−\mathrm{NO}_3^{-}
  2. BCl−\mathrm{Cl}^{-}
  3. CSCN−\mathrm{SCN}^{-}
  4. DCN−\mathrm{CN}^{-}

Correct answer

B. Cl−\mathrm{Cl}^{-}

Step-by-step solution

Cl−,CN−\mathrm{Cl}^{-}, \mathrm{CN}^{-}and SCN−\mathrm{SCN}^{-}froms precipitate with Cu\mathrm{Cu} (I), remove Cu\mathrm{Cu} (I) ion from equilibrium and reaction shift in direction shift in backward direction according to Le-Chatelier's principle.
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