The arrangement of following compounds :
i. bromomethane ii.bromoform
iii. Chloromethane iv. Dibromomethane
In the increasing order of their boiling point is

Options

A. `iv lt iii lt i lt ii`
B. `i lt ii lt iii lt iv`
C. `iii lt i lt iv lt ii`
D. `ii lt iii lt i lt iv `

Answer

C

Explanation

The intermolecular forces of attraction become stronger with the increase in size of the molecules . Hence the order of boiling points will be :
`Cch_(3)Cl lt CH_(3)Br lt CH_(2)Br_(2)lt CHBr_(3)`