Question

Consider the following hydrocarbons
$H_{3}C-\underset{C{H}_3}{\underset{|}{CH}}-C{H}_3$ $H_{3}C-\stackrel{C{H}_3}{\stackrel{|}{\underset{C{H}_3}{\underset{|}{C}}}}-C{H}_3$
(I) (II)
$C{H}_{3}C{H}_{2}C{H}_2-C{H}_3$
(III)
The correct order of boiling point is:

• A. (III) > (I) > (II)
• B. (I) > (II) > (III)
• C. (I) > (III) > (II)
• D. (II) > (III) > (I)

Answer 1

The correct option is A (III) > (I) > (II)

For compounds with same molecular mass, as branching increases the boiling point decreases.