Chemistry - Halogen Derivative Question with Solution | TestHub

KCN is predominantly ionic and dissociates to provide cyanide ions ($C{N}^{-}$) in the solution.

The cyanide ion is an ambident nucleophile, meaning it can attack through either the carbon or the nitrogen atom.

Since KCN is ionic, the carbon atom is free to donate its electron pair. The nucleophilic attack occurs predominantly through the carbon atom because the resulting C-C bond is stronger and more stable than a C-N bond.

This leads to the formation of alkyl cyanides (nitriles) as the major product.

Therefore, the attack occurs through carbon, forming a nitrile.

Answer: Attack occurs through carbon $\to$ Forming nitrile.