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Question

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
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B
1:2:2:3
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C
2:1:2:3
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D
3:2:2:1
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Solution

The correct option is C 2:1:2:3

According to Avogadro's hypothesis, equal volumes of all gases under the similar condition of temperature and pressure contains an equal number of molecules.

Equal volumes contain equal no. of molecules.

Hence no. of atoms of H2, He, O2 and O3 will be in the ratio 2:1:2:3


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