Question

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

(a)  \[\begin{array}{cc}
\ce{CH3}\phantom{..................}\\
\backslash\phantom{...........}\\
\ce{CH - CH - CH2Br}\\
/\phantom{.............}\\
\ce{CH3}\phantom{..................}
\end{array}\]

(b) \[\ce{CH3CH2CH2CH2Br}\]

(c) \[\begin{array}{cc}
\phantom{...}\ce{CH3}\\
\phantom{}|\\
\ce{H3C - C - CH3}\\
\phantom{}|\\
\phantom{..}\ce{Br}
\end{array}\]

विकल्प

• (b) < (a) < (c)

• (a) < (b) < (c)

• (c) < (a) < (b)

• (c) < (b) < (a)

Answer 1

(c) < (a) < (b)

Explanation:

Boiling points of isomeric haloalkanes decrease with increase in branching as with increase in branching surface area decreases which leads to decrease in intermolecular forces.