单选题 适中0.65 引用2 组卷202
如图
为直流电源,
为浸透饱和氯化钠溶液和酚酞试液的滤纸,
为电镀槽。接通电路后(此时开关处于打开状态)发现
上的c点显红色。接通
使c、d两点短路后,可以实现铁上镀锌。下列叙述正确的是
![](https://img.xkw.com/dksih/QBM/2021/2/5/2651416270577664/2651623826423808/STEM/fab9a231-0588-47f5-a6e0-a6df787820dd.png?resizew=186)
![](https://img.xkw.com/dksih/QBM/2021/2/5/2651416270577664/2651623826423808/STEM/8aaf48f1a24a47f48d93216fa1426be6.png?resizew=19)
![](https://img.xkw.com/dksih/QBM/2021/2/5/2651416270577664/2651623826423808/STEM/4cd3d475aeff48d9818d7ff52542bb68.png?resizew=15)
![](https://img.xkw.com/dksih/QBM/2021/2/5/2651416270577664/2651623826423808/STEM/02277618356243e3b34a40cc0c165f16.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2021/2/5/2651416270577664/2651623826423808/STEM/4cd3d475aeff48d9818d7ff52542bb68.png?resizew=15)
![](https://img.xkw.com/dksih/QBM/2021/2/5/2651416270577664/2651623826423808/STEM/c30bc58fb30a4f6391a6c3946fed3e51.png?resizew=15)
![](https://img.xkw.com/dksih/QBM/2021/2/5/2651416270577664/2651623826423808/STEM/fab9a231-0588-47f5-a6e0-a6df787820dd.png?resizew=186)
A.a为直流电源的负极 |
B.c极发生的反应为2H2O+2e-=H2↑+2OH- |
C.f电极为锌板 |
D.e极发生还原反应 |
20-21高二上·江西南昌·期末
类题推荐
图中
为直流电源,
为浸透饱和氯化钠溶液和酚酞试液的滤纸,
为电镀槽.接通电路后发现
上的c点显红色.为实现铁上镀锌,接通
后,下列叙述正确的是
![](https://img.xkw.com/dksih/QBM/2016/1/27/1576272749674496/1576272749805568/STEM/913bd36d11f04546897be4166fe5d0e0.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1576272749674496/1576272749805568/STEM/59c6e974bf3c40009ef883d3b9c0d45f.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1576272749674496/1576272749805568/STEM/0e6e9fa3ff3c49769c5a9523be85bfe3.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1576272749674496/1576272749805568/STEM/cc813a4410cf40bd93d3497fa548241d.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1576272749674496/1576272749805568/STEM/0e6e9fa3ff3c49769c5a9523be85bfe3.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1576272749674496/1576272749805568/STEM/959e8c6848e142dea1da42220bac7982.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1576272749674496/1576272749805568/STEM/913bd36d11f04546897be4166fe5d0e0.png)
A.a为直流电源的负极 | B.d极发生的反应为2H++2e-=H2↑ |
C.e极发生氧化反应 | D.f电极为锌板 |
右图
为直流电源,
为浸透饱和氯化钠溶液和酚酞试液的滤纸,
为电镀槽.接通电路后发现
上的c点显红色.为实现铁上镀铜,接通
后,使c、d两点短路.
![](https://img.xkw.com/dksih/QBM/2011/11/27/1576029010665472/1576029010984960/STEM/5f909d8fd6f5477ba65b2ec4ece5e7f5.png?resizew=137)
下列叙述正确的是( )
![](https://img.xkw.com/dksih/QBM/2011/11/27/1576029010665472/1576029010984960/STEM/47663a5b49644c71805c2c852d4a3c05.png?resizew=21)
![](https://img.xkw.com/dksih/QBM/2011/11/27/1576029010665472/1576029010984960/STEM/732655c34a0b41a097a6a0f0d315047f.png?resizew=18)
![](https://img.xkw.com/dksih/QBM/2011/11/27/1576029010665472/1576029010984960/STEM/af709dc8923d4bdeb4486ce6ca20ea2b.png?resizew=20)
![](https://img.xkw.com/dksih/QBM/2011/11/27/1576029010665472/1576029010984960/STEM/732655c34a0b41a097a6a0f0d315047f.png?resizew=18)
![](https://img.xkw.com/dksih/QBM/2011/11/27/1576029010665472/1576029010984960/STEM/9f16b960e01a41e7ad17ee1fc1dfc728.png?resizew=18)
![](https://img.xkw.com/dksih/QBM/2011/11/27/1576029010665472/1576029010984960/STEM/5f909d8fd6f5477ba65b2ec4ece5e7f5.png?resizew=137)
下列叙述正确的是( )
A.a为直流电源的负极 |
B.c极发生的反应为O2+4e-+2H2O=4OH- |
C.f电极为铁板 |
D.电解质溶液不能用CuCl2溶液 |
下图A为直流电源,B为浸透饱和氯化钠溶液和酚酞试液的滤纸,C为电镀槽。接通电路后发现B上的c点显红色。为实现铁上镀铜,接通K后,使c、d两点短路。下列叙述不正确的是
![](https://img.xkw.com/dksih/QBM/2021/4/21/2704663959511040/2704781128433664/STEM/e99c265b-3455-47b7-9de6-efb002ed8f1a.png)
![](https://img.xkw.com/dksih/QBM/2021/4/21/2704663959511040/2704781128433664/STEM/e99c265b-3455-47b7-9de6-efb002ed8f1a.png)
A.a为直流电源的正极 |
B.e电极为铜板 |
C.d电极产生的气体可使湿润的淀粉碘化钾试纸变蓝 |
D.B上的总反应为2H2O |
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