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试卷代码11

试卷代码11

更新时间:2025-02-25 17:24:17

考试局:Pearson Edexcel 爱德思

考试类别:International Advanced Level

考试阶段:International Advanced Subsidiary

考试科目:Chemistry

考试单元:Unit 1: Structure, Bonding and Introduction to Organic Chemistry

试卷代码:WCH11/01

试卷年份:2019年1月

题目1:

Members of the homologous series of alkanes have the same
A boiling temperature
B density
C empirical formula
D general formula

题目难度:容易

考点分析:考查homologous series

题目分析:homologous series(同系物)具有相同的general formula,所以答案选D。A选项和B选项都是有trend,比如随着carbon chain的增加沸点升高密度变大,而C选项错误,比如CH4和C2H6的最简式就不一样。

题目2:

Which species is not tetrahedral?

题目难度:容易

考点分析:考查species的shape(tetrahedral)

题目分析:A选项Carbon最外层4个电子,和4个Cl生成4个bond(4个bonding pairs),Carbon没有lone pair,所以是tetrahedral;同理,B选项也是如此;D选项N的原先的lone pair和proton生成了dative covalent bond,所以也变成了4个bonding pairs,无lone pair,所以也是tetrahedral;所以答案选C。

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