The volume of oxygen liberated from 15 ml of 20 volume H2O2 is
300 ml
Quantity of H2O2 = 15ml and volume of H2O2 = 20
We know that 20 volume of H2O2 means 1 litre of this solution will give 20 litre at NTP
Since,oxygen liberated from 1000ml (1 litre) of H2O2 = 20 litre,
∴ Oxygen liberate from 15 ml = 201000×15 = 0.3 litre = 300ml