Question

In the electrolysis of water, at which electrodes are hydrogen and oxygen collected? a) graphite rods, metal rods b) cathode, anode c) anode, cathode d) graphite rods, non-metal rods​

Answer 1

Answer:

b) In the electrolysis of water, the gas collected at cathode is hydrogen and the gas collected at anode is oxygen. The gas which is collected in double amount is hydrogen. This is because water contains two molecules as compared to one molecule of oxygen.