Arrange the following halocompounds in increasing order of their boiling points.

(A) Chloromethane
(B) Bromomethane
(C) Bromoform
(D) Dibromomethane

Choose the correct answer from the options given below:

(A), (B), (D), (C)

The correct answer is Option (2) → (A), (B), (D), (C)

Boiling point of haloalkanes increases with increasing molecular mass and polarizability (stronger van der Waals forces).

Given compounds:

• Chloromethane (CH₃Cl) → lowest molar mass  → weakest intermolecular forces → lowest b.p.
• Bromomethane (CH₃Br) --Higher mass than CH₃Cl → stronger forces → higher b.p.
• Dibromomethane (CHâ‚‚Brâ‚‚) --- More Br atoms → higher mass → stronger dispersion forces
• Bromoform (CHBr₃) → Maximum Br atoms → highest mass → strongest forces → highest b.p

So, the increasing order of boiling points is:

Chloromethane < Bromomethane < Dibromomethane < Bromoform