A depolariser used in dry cell batteries is:

sodium phosphate

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ammonium chloride

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manganese dioxide

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potassium hydroxide

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Solution

The correct option is C manganese dioxide
The correct answer is (b) i.e mangenese dioxide . It prevents the accumulation of Hydrogen gas on the cathode.

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The car battery is of 12V. 8 dry cells of 1.5V each is connected in series can ive 12V bt such cells not used in starting a car.Why?

The dry cell is used in

N H_{4} C l

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