Question

The molecular size of $ICl$ and $Br_2$ is approximately same, but boiling point of $ICl$ is about $40^{\circ}$ higher than that of $Br_2$. It is because

• A. $ICl$ bond is stronger than $Br - Br$ bond
• B. $I.E.$ of $I < I.E$. of $Br$
• C. $ICl$ is polar while $Br_2$ is non-polar
• D. $I$ has larger size than $Br$

Answer 1

Answer: (C)

Polar molecules also have dipole-dipole interactions which increase the boiling point