1.选择题- (共3题)
1.硫酸是基础化工的重要产品,硫酸的消费量可作为衡量一个国家工业发展水平的标志.生产硫酸的主要反应为:SO2(g)+ {#mathml#}{#/mathml#} O2(g)⇌SO3(g)
2.在温度、容积相同的3个密闭容器中,按不同方式投入反应物,保持恒温、恒容,测得反应达到平衡时的有关数据如下
(已知N2(g)+3H2(g)=2NH3( g)△H=﹣92.4kJ•mol﹣1)
容器 | 甲 | 乙 | 丙 |
反应物投入量 | 1mol N2、3mol H2 | 2mol NH3 | 4mol NH3 |
NH3的浓度(mol•L﹣1) | c1 | c2 | c3 |
反应的能量变化 | 放出akJ | 吸收bkJ | 吸收ckJ |
体系压强(Pa) | p1 | p2 | p3 |
反应物转化率 | α1 | α2 | α3 |
请写出下列物理量的关系:
3.密闭容器中加入4mol A、1.2mol C和一定量的B三种气体,一定条件下发生反应,各物质的浓度随时间变化如甲图所示[已知t0~t1阶段保持恒温、恒容,且c(B)未画出].乙图为t2时刻后改变反应条件,反应速率随时间的变化情况,已知在t2、t3、t4、t5时刻各改变一种不同的条件,其中t3时刻为使用催化剂.
2.单项选择- (共6题)
4.
Usually a child’s behavior is a ________of his family environment.
A.recognition | B.reflection |
C.return | D.record |
5.
——The speaker got confused, and started _________ himself.
——No wonder no one believes what he said.
——No wonder no one believes what he said.
A.contrasting | B.comparing | C.proving | D.contradicting |
6.
When people move to another country, they often try to________ the customs of their native land.
A.turn on | B.bring up | C.keep up | D.give up |
7.
——Recent years have________ rapid changes of my hometown.
——Yes, I could hardly recognize it when I arrived yesterday.
——Yes, I could hardly recognize it when I arrived yesterday.
A.watched | B.contributed | C.made | D.witnessed |
8.
Affected by the earthquake happening in March, seven springs____________.
A.dried up | B.dried out | C.dried off | D.dried away |
试卷分析
-
【1】题量占比
选择题:(3道)
单项选择:(6道)
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【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:6
7星难题:0
8星难题:0
9星难题:0