In Dry cell, cathode is made up of_______?
Correct answer: B. Carbon (Graphite)
- A. Zinc
- B. Carbon (Graphite)
- C. ZnCl²
- D. MnO²(Pyrolusite)
Explanation
In a zinc-carbon dry cell, the graphite rod serves as the cathode and conducts electrons from the manganese dioxide cathodic mixture. Students may choose manganese dioxide because it participates in the cathode reduction reaction, but the electrode itself is the carbon rod.
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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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