Question

Haloarenes react with halogens in the presence of ferric salt as catalyst to give ortho and para dichloro benzene. Which of the following products predominates in ortho and para isomers in this case?

• A. Ortho-dichlorobenzene
• B. Para-dichlorobenzene
• C. Meta-dichlorobenzene
• D. A and C both

Answer 1

The correct option is B Para-dichlorobenzene

Haloarenes react with halogens in the presence of ferric salt as catalyst to give ortho and para dichloro benzene.

Out of ortho and para positions para isomer predominates on ortho isomer due to steric factor.

Option B is correct.