Question

Select from the following a decomposition reaction in which source of energy for decomposition is light :

Define a decomposition reaction. Write chemical equation for the reaction that occurs when lead nitrate is heated strongly in a boiling tube.

In electrolytic decomposition of water two gases are liberated at the electrodes. Give the mass ratio of the gas liberated at the cathode and at the anode.

Answer the following questions in the context of electrolysis of water :