Hydrocarbons 1 Question 13
13. The highest boiling point is expected for
$(1986,1 \mathrm{M})$
(a) iso-butane
(b) $n$-octane
(c) 2, 2, 3, 3-tetramethyl butane (d) $n$-butane
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Solution:
- Boiling point of alkane increases with molar mass. Among isomeric alkanes, branching decreases boiling point. Therefore, $n$-octane has highest boiling point, higher than
2, 2, 3, 3-tetramethyl-butane (an isomer of $n$-octane).
