Question

Which of the following has highest boiling point?

Options

• C₂H₅ − F

• C₂H₅ − Cl

• C₂H₅ − Br

• C₂H₅ − I

Answer 1

C₂H₅ − I

Explanation:

For the same alkyl group, the boiling points of haloalkanes are in the order of \[\ce{RF < RCl < RBr < RI}\] As the size of the halogen atom rises, the amount of van der Waals forces of attraction also increases, leading to elevated boiling points.