Question: why mno2 is used in dry cell?
Answer: Manganese (IV) oxide is the inorganic compound with the formula MnO2. ... Moreover, MnO2 increases the life-span of a Leclanche dry cell battery; to increase the rate of removal of hydrogen bubbles in a Leclanche dry cell. MnO2 is also used for dry-cell batteries, such as the alkaline battery and the zinc-carbon battery.