Question

Alkyl halides are more reactive than:

• A. vinyl chloride
• B. chlorobenzene
• C. benzyl chloride
• D. All of the above

Answer 1

The correct option is D All of the above

For $S{N}_2$ mechanism:
Alkyl halides are more reactive than vinyl chloride, chlorobenzene and benzyl chloride.
Alkyl halides are more reactive due to the polarised bond of $R-X$. Because of this polarization, carbon becomes electron-deficient and alkyl halides become more reactive.
For $S{N}_1$ reactions: formed allylic carbocation is most stable among all. So, correct order of reactivity is allyl chloride > vinyl chloride > propyl chloride.