MCQ
Consider the coordination compound, $\mathrm{K}_2\left[\mathrm{Cu}(\mathrm{CN})_4\right]$. A coordinate covalent bond exists between:
- A$\mathrm{Cu}^{2+} \text { and } \mathrm{K}^{+}$
- ✓$\mathrm{Cu}^{2+} \text { and } \mathrm{CN}^{-}$
- C$\mathrm{K}^{+} \text {and } \mathrm{CN}^{-}$
- D$\mathrm{K}^{+} \text {and }\left[\mathrm{Cu}(\mathrm{CN})_4\right]^{2-}$