单选题 较易0.85 引用9 组卷287
普通锌锰干电池的构造如图所示,其电池反应的方程式为:
,下列说法正确 的是
![](https://img.xkw.com/dksih/QBM/2022/4/21/2963049887211520/2964897416404992/STEM/2cff9fe8-7fba-49fa-af34-edcd21dd1f88.png?resizew=156)
![](https://img.xkw.com/dksih/QBM/2022/4/21/2963049887211520/2964897416404992/STEM/2cff9fe8-7fba-49fa-af34-edcd21dd1f88.png?resizew=156)
A.石墨作负极 |
B.锌发生还原反应 |
C.电池工作时,电子从石墨经导线流向锌 |
D.正极的电极反应为: |
20-21高一下·全国·课后作业
类题推荐
纽扣式银锌电池的构造如图所示,电池的总反应为:Zn+Ag2O+H2O=Zn(OH)2+2Ag。下列说法不正确的是
![](https://img.xkw.com/dksih/QBM/2016/5/31/1576419217596416/1576419217940480/STEM/673c235f23b44607af6dd2025102ddb0.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1576419217596416/1576419217940480/STEM/673c235f23b44607af6dd2025102ddb0.png)
A.Zn作负极 | B.电子经外电路流向Ag2O极 |
C.K+向Zn极移动 | D.正极反应:Ag2O+2H2O+2e-=2Ag+2OH- |
关于右图所示的原电池,下列说法正确的是
![](https://img.xkw.com/dksih/QBM/2016/5/3/1576408392507392/1576408392876032/STEM/577512d9b95c44f8b725ef552a2745e2.png)
![](https://img.xkw.com/dksih/QBM/2016/5/3/1576408392507392/1576408392876032/STEM/577512d9b95c44f8b725ef552a2745e2.png)
A.电子从锌电极通过电流表流向铜电极 |
B.锌电极发生还原反应,铜电极发生氧化反应 |
C.反应后,锌电极的质量减小 |
D.铜电极作正极,发生的电极反应为2H++2e-═H2↑ |
纽扣式银锌电池的构造如图所示,电池的总反应为:Zn+Ag2O+H2O=Zn(OH)2+2Ag,下列说法不正确的是
![](https://img.xkw.com/dksih/QBM/2016/1/12/1576253472563200/1576253472768000/STEM/6a1304f6ba80400da9b86488e571d42b.png)
![](https://img.xkw.com/dksih/QBM/2016/1/12/1576253472563200/1576253472768000/STEM/6a1304f6ba80400da9b86488e571d42b.png)
A.Zn作负极 |
B.电子经外电路流向Ag2O极 |
C.K+向Zn极移动 |
D.正极反应:Ag2O+H2O+2e-=2Ag+2OH- |
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