Equal mass of H2, O2 and methane have been taken in a container of volume V at temperature 27oC in identical conditions. The ratio of the volumes of gases H2 : O2 : CH4 would be (CBSE AIPMT 2014)

At given temperature and pressure, volume of any gas is directly proportional to its number of moles. i.e. ( , ) V n T P The ratio of the volume of gases can be determined in terms of their moles. The ratio of volumes of H2 : O2 : CH4 is given by Volume of H2: Volume of O2: Volume of CH4 = : : 2 32 16 w w w 2 2 4 ( 2, 32, 16) 16 :1: 2 H O CH M M M