Which among the following has lowest boiling point?

Question

TestHub · Accepted Answer

The boiling point of alkyl halides increases with an increase in the molecular mass and the size of the halogen atom.

The molecular masses of the given compounds are in the order: Chloromethane ( $C H_{3} Cl$ ) < Bromomethane ( $C H_{3} B r$ ) < Dibromomethane ( $C H_{2} B r_{2}$ ) < Tribromomethane ( $C H B r_{3}$ ).

Since chloromethane has the lowest molecular mass among the given options, the magnitude of van der Waals forces of attraction is the weakest in it.

Therefore, chloromethane has the lowest boiling point.

Answer: Chloromethane

Chemistry - Halogen Derivative Question with Solution | TestHub

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