Question

The volume of oxygen liberated from 15 ml of 20 volume $H_2{O}_2$ is

• A. 250 ml
• B. 300 ml
• C. 150 ml
• D. 200 ml

Answer 1

The correct option is B

300 ml

20 volume $H_2{O}_2$ means, 1 ml of this solution releases 20 ml. of oxygen gas upon decomposition. Therefore the volume of oxygen released from 15 ml. of the solution is 300 ml.