In which of the following cells , carbon is not used as positive electrode?

Leclanché cell

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Lead-acid storage battery

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Dry cell

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None of the above

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Solution

The correct option is B
Lead-acid storage battery

Carbon is not used as a positive electrode in Lead-acid storage batteries because
Its positive electrode is made of lead oxide.
A lead-acid storage battery is a type of rechargeable battery.
Hence, the correct option is (B).

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