J2_水的电解
Quiz
•
Science
•
8th Grade
•
Practice Problem
•
Hard
W.Y. Tan
Used 9+ times
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12 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
在电解水的实验中可以直接观察到的现象是_____________
水是由氢、氧元素组成
有氢气和氧气产生,且体积比为2:1
每个水分子是由两个氢原子和一个氧原子构成
两电极均冒气泡,a管内气体与b管内气体的体积比约为2:1
2.
MULTIPLE SELECT QUESTION
2 mins • 1 pt
根据图中水电解的装置,请写出A和B是什么气体?
A 氢气
B 氢气
A 氧气
B 氧气
3.
MULTIPLE SELECT QUESTION
2 mins • 1 pt
根据图中电解水的装置,请写出C和D是哪一个电极
C 正极
C 负极
D 正极
D 负极
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
电解水产生的氢气和氧气的体积之比约为_____。
2:1
1:2
3:1
1:3
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
关于电解水实验,下列说法正确的是_____________
阳极产生的气体是氢气
阳极产生的气体体积大
阴极产生的气体质量大
阴极产生气体的体积大
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
下列有关电解水实验的说法中,错误的是_____________
与正极相连的电极产生氧气
与负极相连的电极上产生的气体能燃烧
产生氧气、氢气的体积比为2:1
可以证明水是由氢、氧两种元素组成的
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
如图是电解水的微观示意图,从中获得的信息错误的是_____。
化学变化中,分子可分为原子,原子不能再分
反应前后分子的种类和数目没有改变
生成的氢分子与氧分子的分子个数比为2:1
一个氧分子由2个氧原子构成
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