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# Four one litre flasks are separately filled with the gases hydrogen, helium , oxygen and ozone at the same room temperature and pressure. The ratio of total number of atoms of these gases present in the different flasks would be

$(a)\;1:1:1:1 \\ (b)\;1:2:2:3 \\(c)\;2:1:2:3 \\(d)\;3:2:2:1$
Can you answer this question?

According to Avogadro's hypothesis equal volumes of all gases under similar condition of temperature and pressure contains equal number of molecules.
Hence number of atom of $H_2,H_e,O_2$ and $O_3$ will be in the ratio $2:1:2:3$
Hence c is the correct answer.
answered Apr 1, 2014 by