Question

Identify the correct reason for higher boiling point of $ICl$ than $B{r}_2$.

• A. higher molecular weight of $ICl$ than $B{r}_2$
• B. presence of dipole - dipole forces in $ICl$
• C. presence of vanderwaals forces in $ICl$
• D. None of these

Answer 1

The correct option is B presence of dipole - dipole forces in $ICl$

The correct reason for higher boiling point of $ICI$ than $B{r}_2$ is the presence of dipole - dipole forces in $ICI$.
$B{r}_2$ is non polar as two $Br$ atoms have same electronegativity. $ICl$ is polar due to electronegativity difference between $I$ and $Cl$ atoms.