500ml of H2O2 solution liberates 1200ml of O2 at STP during its decomposition. The volume strength of H2O2 solution is
22.4vol
24vol
2.4vol
11.2vol
500 ml of H2O2 gives 1200 ml of O2
So, 1ml of H2O2 = 1200500 ml= 2.4ml