What is used as the electrolyte in a carbon-zinc cell?

In a carbon-zinc cell, the electrolyte primarily consists of ammonium chloride (NH4Cl) along with manganese dioxide (MnO2) and granulated carbon. The ammonium chloride serves as the electrolyte solution that facilitates the flow of ions inside the cell. Manganese dioxide is used as a depolarizer which counters the formation of hydrogen gas at the anode, enhancing the efficiency of the cell. The granulated carbon acts as the negative electrode, providing a conductive surface for the electrochemical reactions.

This combination of materials is effective for creating a simple, inexpensive battery commonly used in various low-drain devices, such as remote controls and flashlights. The use of different materials in the other options does not align with the standard composition of a carbon-zinc cell, which primarily relies on ammonium chloride as its electrolyte.