NEET UG CHEMISTRY MCQ: CO-ORDINATION COMPOUNDS

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Ammonia forms the complex ion

{\left[ {\mathrm{Cu}{{\left( {\mathrm{N}{\mathrm{H}_3}} \right)}_4}} \right]^{2 + }}

with copper ions in alkaline solution but not in acidic solution. What is the reason for it?

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Correct option: D

In acidic solutions, protons coordinate with ammonia molecules forming

\mathrm{NH}_4^ +

ions and

\mathrm{N}{\mathrm{H}_3}

molecules are not available

Option D (In acidic solutions, protons coordinate with ammonia molecules forming

\mathrm{NH}_4^ +

ions and

\mathrm{N}{\mathrm{H}_3}

molecules are not available) is correct because the presence of protons in acidic solution consumes ammonia, preventing it from acting as a ligand.

More Questions from CO-ORDINATION COMPOUNDS

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\left[ {\mathrm{PtC}{\mathrm{l}_2}{{\left( {\mathrm{N}{\mathrm{H}_3}} \right)}_4}} \right]\mathrm{B}{\mathrm{r}_2}\mathrm{\;and\;}\left[ {\mathrm{PtB}{\mathrm{r}_2}{{\left( {\mathrm{N}{\mathrm{H}_3}} \right)}_4}} \right]\mathrm{C}{\mathrm{l}_2}\mathrm{\;}

\left[\mathrm{Cr}(\mathrm{Ox})_{2} \mathrm{ClBr}\right]^{3-}

\text{ox =}

x

{\left[ {\mathrm{Ni}{{\left( {\mathrm{CN}} \right)}_4}} \right]^x}

\mathrm{M}{\mathrm{n}^{2 + }}

\mathrm{CuS}{\mathrm{O}_4}

{\mathrm{K}_2}\left[ {\mathrm{Ni}{{\left( {\mathrm{CN}} \right)}_4}} \right]