Question: Q.1. The decreasing order of boiling points of the following alkanes is :
(a) heptane
(b) butane
(c) 2-methylbutane
(d) 2-methylpropane
(e) hexane
Choose the correct answer from the options given below:
A) $(a) $>$ (e) $>$ (c) $>$ (b) $>$ (d)$
B) $(a) $>$ (c) $>$ (e) $>$ (d) $>$ (b)$
C) $(c) $>$ (d) $>$ (a) $>$ (e) $>$ (b)$
D) $(a) $>$ (e) $>$ (b) $>$ (c) $>$ (d)$
Answer: $(a) $>$ (e) $>$ (c) $>$ (b) $>$ (d)$
Sol:
- With increase in number of carbons in alkane, boiling point increases
- In case of isomeric alkanes, greater is the number of branches, lesser is the boiling point.
