7) Consider the three isomeric alkanes n-hexane, 2,3-dimethylbutane, and 2-methylpentane.
Which of the following correctly lists these compounds in order of increasing boiling point?
A) 2,3-dimethylbutane < 2-methylpentane < n-hexane
B) 2-methylpentane < 2,3-dimethylbutane < n-hexane
C) n-hexane < 2-methylpentane < 2,3-dimethylbutane
D) 2-methylpentane < n-hexane < 2,3-dimethylbutane
E) n-hexane < 2,3-dimethylbutane < 2-methylpentane