48. In a common dry cell (Leclanché cell), which of the following solid paste components acts specif — Electrochemistry Chemistry Question

💡 Solution & Explanation

In the dry cell, $MnO_2$ acts as a depolarizer. It prevents the buildup of hydrogen gas at the cathode by oxidizing it, while manganese itself is reduced from the +4 oxidation state in $MnO_2$ to the +3 state in $MnO(OH)$.