It is customary to indicate the strength of a sample of H_(2)O_(2) under specification of volume. The strength of H_(2)O_(2)solution can also be in %(w/v) or molarity or normality,"10 Vol H_(2)O_(2)solution means I ml ofH_(2)O_(2) solution decomposes to give 10 ml of O_(2) gas at STP. 1 lit of H_(2)O_(2)solution decomposes to give 10 lit of O_(2)gas at STR. ''30 vol hydrogen peroxide means

It is customary to indicate the strength of a sample of H_(2)O_(2) und

1.	It is customary to indicate the strength of a sample of H_(2)O_(2) under specification of volume. The strength of H_(2)O_(2)solution can also be in %(w/v) or molarity or normality,"10 Vol H_(2)O_(2)solution means I ml ofH_(2)O_(2) solution decomposes to give 10 ml of O_(2) gas at STP. 1 lit of H_(2)O_(2)solution decomposes to give 10 lit of O_(2)gas at STR. ''30 vol hydrogen peroxide means
Answer» 30% `H_2O_2` solution `30cm^3` of the solution contains 1g of `H_2O_2` `1 cm^3` of the solution liberated `30cm^3` of `O_2` at STP `30 cm^3` of the solution contain 1 mole of `H_2O_2` Solution :30 Vol of `H_2O_2` solution MEANS, 1ML of this solution produces 30 ml of `O_2` at STP