ALevel化学(9701)Paper 1一共包含40道选择题,考试时间1小时。
这意味着平均1分半要完成1道题,而我们刷题的时候也发现了,经常ABCD四个选项都要做一遍判断和排除,实际上选择题的考察,考生的工作量还是很大的。
选择题里既会涉及到基本的定义,方程式及现象的判断,还有一些鉴定手段,当然还包括难度不亚于paper 2的计算,因此这就要求我们考生对这些知识点要熟练掌握。

考试局:Cambridge Assessment International Education (CAIE)
考试类别:International Advanced Level
考试阶段:International Advanced Subsidiary
考试科目:Chemistry
考试单元:Paper 1 Multiple Choice
试卷代码:9701/12
试卷年份:May/June 2019
题目1:
Which pair of substances are both simple molecular?
A C60 and graphene
B C60 and iodine
C graphene and graphite
D graphite and iodine
题目难度:容易
考点分析:考查simple molecular的判断
题目分析:graphene是graphite的一层,都为大分子结构,C60看起来是大分子,但是实际上是simple molecular(能数的清),iodine是simple molecular,可以得出答案为B。
题目2:
A reaction pathway diagram is shown.

Which row is correct?

题目难度:容易
考点分析:考查reaction pathway diagram和吸放热的判断
题目分析:forward reaction的enthalpy change是从reactants到products,所以是K,reverse reaction的activation energy是从products指向最高点,所以是O,可以得出答案为B。
题目3:
X is either chlorine or an oxide of chlorine.
X reacts with water, under suitable conditions, to form the two acids HCl and HClO3 in the mole ratio of 1 (HCl ) : 5 (HClO3).
What could be X?

题目难度:一般
考点分析:考查reaction pathway diagram和吸放热的判断
题目分析:HCl里的Cl是-1价,HClO3里的Cl是+5价,mole ratio是1:5,设X里Cl是n价,则n+1=5*(5-n),可以得出n=4,答案为C。