Question
Chemistry Question on Hydrocarbons
Which of the following compounds has least boiling point?
A
2-Methylbutane
B
n-Hexane
C
n-Pentane
D
2,2-Dimethylpropane
Answer
2,2-Dimethylpropane
Explanation
Solution
Boiling point of alkanes increases with increase in molecular mass and among isomers of the same compound it decreases with increase in branching. Hence the order of boiling point is n-Hexane > n-Pentane > 2-Methylbutane > 2,2-Dimethylpropane