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B
Graphite
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C
Ammonium chloride
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D
Manganese dioxide
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Solution
The correct option is C Zinc A zinc-carbon battery is a dry cell battery between a zinc metal electrode and a carbon rod from an electrochemical reaction between zinc and manganese dioxide mediated by a suitable electrolyte.
It is usually conveniently packaged in a zinc can which also serves as the anode with a negative potential, while the inert carbon rod is the positive cathode.
Zinc acts as a negative electrode as it has more negative potential and acts as the anode.