The molecular size of ICl and Br\_2 are ≈imately the same, b... | Chemistry - Intermolecular Forces (Van der Waals Forces) and their effect on Physical Properties | SolveeIt | Solveeit

Today, September 3

Question

The molecular size of ICl and $Br_2$ are approximately the same, but the boiling point of ICl is much higher than that of $Br_2$ because

Visual representation for Chemistry

A

ICl is polar but $Br_2$ is non polar

B

$Br_2$ is more polarisable than ICl

C

ICl is an ionic compound while $Br_2$ is co-valent

D

I – Cl bond is stronger than Br – Br bond

Answer

ICl is polar but $Br_2$ is non polar

Explanation

Solution

The boiling point depends on intermolecular forces. ICl is a polar molecule due to the electronegativity difference between I and Cl, exhibiting dipole-dipole interactions in addition to London Dispersion Forces (LDFs). $Br_2$ is a nonpolar molecule, only exhibiting LDFs. Since dipole-dipole interactions are stronger than LDFs (for molecules of comparable size), ICl has stronger overall intermolecular forces, leading to a higher boiling point than $Br_2$ .