Question

when hydrogen gas burns in presence of oxygen water is formed when water is electrolysed than hydrogen and Oxygen gas are produced state the kind of reaction that takes place in the first case and in the second case
and experiment setup for electrolysis of water hydrogen and oxygen gases are produced at cathode and third respectively mention the ratio of volume of Oxygen and hydrogen gases ​

Answer 1

Answer:

in first case combination reaction take place

and decomposition reaction in second reaction

the ratio of hydrogen and oxygen in water is 2:1