Question

Which one of the following has highest boiling point?

• A. $H_{3}CC{H}_{2}C{H}_{2}C{H}_{2}Cl$
• B. $(H_{3}C{)}_{2}CHC{H}_{2}Cl$
• C. $(H_{3}C{)}_{3}CCl$
• D. $H_{3}CC{H}_2\underset{\underset{Cl}{|}}{C}HC{H}_3$

Answer 1

The correct option is A $H_{3}CC{H}_{2}C{H}_{2}C{H}_{2}Cl$

Boiling point of compounds is directly proportional to molecular mass of compound. Since the boiling point of all the compounds are the same. So we have to consider the branching.

• Boiling point of compound decreases with increases in branching.

Here,the branching in $\left(C{H}_3\right)C-Cl$ is highest so,it has least boiling point and $C{H}_{3}C{H}_{2}C{H}_{2}C{H}_{2}Cl$ has least branching i.e, straight-chain so,it has a highest boiling point.

Option A is correct.