Question

Arrange the following molecules in the order of increasing boiling point.

(a) I2 < Br2 < Cl2 < F2

(b) F2 < Cl2 < Br2 < I2

(c) F2 < Br2 < Cl2 < I2

(d) Cl2 < F2 < I2 < Br2

This question was posed to me during an interview.

I'm obligated to ask this question of Intermolecular Forces topic in section Materials and their Properties of Engineering Chemistry I

Answer 1

Correct answer is (b) F2 < Cl2 < Br2 < I2

Best explanation: The correct order of boiling point is F2 < Cl2 < Br2 < I2.

It is due to the highest electronegativity of fluorine atom.