In alkaline battery the anode is made up of______________________?
Correct answer: B. Zn
- A. MnO2
- B. Zn
- C. AgO2
- D. cadmium
Explanation
In an alkaline battery, zinc is oxidized at the anode: Zn -> Zn2+ + 2e-. Manganese dioxide acts mainly as the cathode material and accepts the electrons through the reduction reaction. The likely mistake is choosing MnO2, which confuses the cathode with the anode.
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About Redox Reactions
Redox reactions involve oxidation and reduction occurring together, with electrons transferred between species or oxidation numbers changing. The topic covers assigning oxidation states, identifying oxidizing and reducing agents, balancing redox equations by oxidation number or half-reaction methods, and connecting chemical changes with galvanic and electrolytic cells.
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