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Question
Arrange the following compounds in increasing order of their boiling points.
(a) \[\begin{array}{cc}
\ce{CH3}\phantom{.................}\\
\backslash\phantom{.............}\\
\ce{CH - CH2Br}\\
/\phantom{.............}\\
\ce{CH3}\phantom{.................}
\end{array}\]
(b) \[\ce{CH3CH2CH2CH2Br}\]
(c) \[\begin{array}{cc}
\phantom{...}\ce{CH3}\\
\phantom{}|\\
\ce{H3C - C - CH3}\\
\phantom{}|\\
\phantom{..}\ce{Br}
\end{array}\]
Options
(b) < (a) < (c)
(a) < (b) < (c)
(c) < (a) < (b)
(c) < (b) < (a)
Solution
(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.
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