Which reagent is most suitable for the conversion of an alkyl chloride to an alkyl iodide?

Solution

1. The Finkelstein reaction is an equilibrium reaction.
2. Sodium chloride or potassium chloride is insoluble in acetone.
3. According to Le Chatelier's principle, the precipitation of the salt drives the reaction to completion.
4. Acetone is the preferred solvent for this transformation.
5. Hence the answer is (A).