1.选择题- (共14题)
4.除去下列各组物质中的杂质,所用试剂和方法均正确的是( )
物质 | 杂质 | 除杂所用的试剂和方法 | |
A | H2 | HCl气体 | 先通过NaOH溶液,再通过浓硫酸 |
B | NaOH溶液 | Ba(OH)2溶液 | 先加入CuSO4溶液、过滤 |
C | CO气体 | CO2气体 | 通过灼热的CuO |
D | Cu (OH)2固体 | CuCl2 | 加入适量的稀盐酸 |
5.除去下列各组物质中的杂质,所用试剂和方法均正确的是( )
物质 | 杂质 | 除杂所用的试剂和方法 | |
A | H2 | HCl气体 | 先通过NaOH溶液,再通过浓硫酸 |
B | NaOH溶液 | Ba(OH)2溶液 | 先加入CuSO4溶液、过滤 |
C | CO气体 | CO2气体 | 通过灼热的CuO |
D | Cu (OH)2固体 | CuCl2 | 加入适量的稀盐酸 |
12.化学兴趣小组的同学取10g某锌样品(含少量杂质,且杂质不溶于水,也不与酸反应)于烧杯中,向其中加入一定量的稀硫酸,当加入稀硫酸的质量为93.7g时,恰好完全反应,生成气体的质量与反应时间的关系如下图所示,试回答下列问题:
2.单项选择- (共10题)
15.
Spending______ Christmas in a foreign country with local people was really _____ unforgettable experience for me.
A.\;an | B.\;\ | C.the; an | D.the; \ |
16.
With all the tasks finished ahead of time, she felt a great weight her mind.
A.picked up | B.ended up | C.taken off | D.put down |
17.
For some reason, we hurriedly ended our meeting, a lot of problems to be settled.
A.leaving | B.to leave | C.leave | D.left |
18.
with an important decision, one that can affect his future, he doesn’t know what to do.
A.Face | B.Facing | C.To face | D.Faced |
19.
---Have you ever had any skin problems _______eating junk food?
---- Yes, two years ago.
---- Yes, two years ago.
A.close to | B.different from | C.far from | D.connected with |
20.
A car accident happened on the highway because of the heavy fog, but
no one got seriously injured.
no one got seriously injured.
A.sadly | B.luckily | C.hopefully | D.unfortunately |
21.
--- How long has your brother been working in this factory?
--- he graduated from college.
--- he graduated from college.
A.When | B.By the time |
C.Until | D.Ever since |
22.
Some people like coffee, _____others like tea. It’s all a matter of personal taste.
A.which | B.however | C.what | D.while |
23.
A fire broke out in the neighborhood last night. By the time the firemen arrived, it .
A.had been put out | B.would put out |
C.has been put out | D.was putting out |
试卷分析
-
【1】题量占比
选择题:(14道)
单项选择:(10道)
-
【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:0
5星难题:0
6星难题:10
7星难题:0
8星难题:0
9星难题:0