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QUESTION
Q31) Four one litre flask are separately filled with the gases hydrogen, helium, oxygen and ozone at the same temperature and pressure. The ratio of total number of atoms of these gases present in different flask would be.. [ NCERT 1980]




SOLUTION

Pressure, volume and temperature is same for all the gases thus have equal number of moles of gases
But Hydrogen is diatomic, Helium is mono atomic, Oxygen is diatomic and Ozone is triatomic
Thus ratio of molecule is 1:1:1: but ratio of atoms is 2:1:2:3Answer: (c)