Question

Which of the following has the highest boiling point?

• A. lodobenzene
• B. Bromobenzene
• C. Chlorobenzene
• D. Fluorobenzene

Answer 1

Answer: (A)

lodobenzene

Answer 2

For the same aryl group, b.p. increases as the size of the halogen increases. Thus, ${C6H5I}$ has the highest b.p.