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Electrochemical Cells, Galvanic Cells

A depolarizer...

Question

A depolarizer used in dry cell is:

A

ammonium chloride

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B

manganese dioxide

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C

potassium oxide

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D

sodium phosphate

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Solution

The correct option is B manganese dioxide
In the dry cell, manganese dioxide is used as depolarizer. It prevents the collection of hydrogen gas on the cathode.
Hence, option B is correct.

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