Question
The following reaction method is not suitable for the preparation of the corresponding haloarene products, due to high reactivity of halogen, when X is :
NEET
Chemistry
Haloalkanes and Haloarenes
2024
NEET 2024 (Re-NEET)
NEET Chemistry Question (2024) — Solution
Options
- A. F
- B. I
- C. Cl
- D. Br
Answer
A. F
Step-by-step solution
- Aryl chlorides and bromides can easily be prepared by electrophilic substitution of arenes (toluene) with Cl _2 and Br _2 respectively in the presence of Lewis acid catalyst ( Fe in dark). - Reaction with I _2 is reversible and requires the presence of oxidising agent. - Corresponding fluoroarene is not prepared by this method due to high reactivity of fluorine. Hence, ' X ' is F.
Related: Chemistry — Haloalkanes and Haloarenes · All PYQ Banks