Question

Electrolysis of water is a decomposition reaction. If 20 ml of hydrogen gas is produced then the amount of oxygen collected will be
(a) 10 ml
(b) 30 ml
(c) 45ml
(d) 40ml​

Answer 1

Answer:

10ml

Explanation:

as hydrogen:oxygen for H2O is 2:1 so for 20ml of hydrogen -

(20÷2=10 ) 10ml of oxygen is required.