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。