Which of the following devices function on redox reaction? l. Dry cell ll. Car battery III. Electric generator
Answer Details
Both the dry cell and car battery function on redox reactions, which involve the transfer of electrons between reactants.
A dry cell contains an electrolyte paste that allows for the transfer of electrons between the zinc outer casing (anode) and the carbon rod (cathode) in the center of the cell. The zinc atoms lose electrons and become positively charged ions, while the carbon atoms gain those electrons and become negatively charged ions. This transfer of electrons creates an electric current that can power devices like flashlights.
Similarly, a car battery uses a redox reaction to generate electricity. The battery contains two electrodes - a lead dioxide cathode and a lead anode - that are immersed in an electrolyte solution of sulfuric acid. When the battery is connected to a circuit, the lead dioxide electrode accepts electrons from the lead anode, creating a flow of electricity.
An electric generator, on the other hand, does not rely on a redox reaction to function. Instead, it works by converting mechanical energy into electrical energy. The generator contains a wire coil that rotates within a magnetic field, creating an electric current in the wire.
Therefore, the devices that function on redox reactions are l and ll only, and the answer is option C - l and ll only.