Question

plzzz ans ques 2 ....​

Answer 1

Because In H20 there is two atoms of hydrogen and one atom of oxygen and we know that hydrogen attach with anode as impurity and oxygen attach with cathode so hydogen is doble amount in anode.

Answer 2

The gas which is collected in double the amount in the electrolysis of wqter experiment is hydrogen. This is because water contain two parts of hydrogen element as compared to one part of oxygen element by volume