Question

In the electrolysis of water (a) name the gas collected at cathode and anode respectively (b) why is the volume of the gas collected in one electrode doubled than at the other? c) give distinguishing tests for the gases evolved.

Answer 1

ANSWER

(i) Oxygen at the anode and hydrogen at the cathode.

(ii) Chemical formula H2O - for every oxygen atom there are 2 hydrogen atoms. Hydrogen is double the oxygen produced.

(iii) Oxygen will relight a glowing splint. Hydrogen will make a squeaky pop sound when you put a lit splint into it.

Answer 2

(a) cathode- hydrogen

anode- oxygen

(b) bcz of molecular formula of water (H20) 2 hydrogen atoms & 1 oxygen. Therefore, due to more no.of H atoms, one electrode consists of more gas.

(C) I didn’t understand the question