本题目来源于试卷: Models of Bonding & Structure B.2 The Covalent Model，类别为 IB化学
[单选题]
Which statement correctly explains why the boiling point of 2-methylpentane is lower than that of hexane?
A. 2-methylpentane has fewer electrons than hexane
B. 2-methylpentane has a smaller $M_r$ than hexane
C. 2-methylpentane has more branching than hexane
D. 2-methylpentane has lower electron density than hexane
参考答案: C
本题详细解析:
2-methylpentane is branched and therefore has a lower surface area. The lower the surface area, the weaker the London (dispersion) forces and the lower the boiling point.
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