Question

Carbon dioxide gas is heavier than oxygen and nitrogen. Why does it not form a lower layer in the
atmosphere?

Answer 1

Dear Student
Gases possess the property of diffusion which is independent of the force of gravitation.
Though carbon dioxide is heavier than oxygen and nitrogen, but it has a tendency to mix (diffusion) with other gases of air and remain almost uniformly distributed in the atmosphere.
​​​​​​So the carbon dioxide could not be able to be in the lower layer of atmosphere.
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