Question

In electrolysis of water, why is the volume of gas collected over one electrode double the volume of gas collected over the other electrode?

Answer 1

Hydrogen and Oxygen always react in the Ratio 2:1 to form water. This is why when water is electrolysed , the volume of the gas collected over the cathode is twice the volume of the gas collected  over the anode.

Answer 2

Answer:

In electrolysis of water :

a ) . Hydrogen gas collected at cathode. And oxygen gas gas collect at anode.

b ) . We know that in water there is 2 hydrogen atom and 1 oxygen atom. That's why volume of gas collected at one electrode double than the other.

c ) . Pure water is a bad conductor of electricity when we add drops of dil sulphuric acid we make it a good conductor of electricity.