Target Exam

CUET

Subject

Chemistry

Chapter

Organic: Haloalkanes and Haloarenes

Question:

For a particular alkyl group R, what is the correct order of boiling points of the following compounds?

Options:

 RF > RBr > RCl

RBr > RCl > RF

RF > RCl > RBr

RCl > RBr > RF

Correct Answer:

RBr > RCl > RF

Explanation:

As the size of halogen atom increases, the magnitude of van der Waal forces increases, that is why RF has the lowest boiling point as it is the smallest halogen atom with weakest van der Waal attraction.