Question

how will you demonstrate that air mainly contains oxygen and nitrogen ​

Answer 1

Explanation: Demonstrate through a simple experiment that the air mainly contains nitrogen and oxygen in the volume ration of $$4 : 1$$. ... The raised level in water is $${1}/{5}$$ of the volume of air in the gas jar. This proves that one part of the air of the jar is a gas which supports combustion, i.e., oxygen.

Answer 2

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ANSWER:

      Air mainly contains nitrogen and oxygen in the volume ration of 4 : 1.

      The raised level in water is {1}/{5} of the volume of air in the gas jar.

      This proves that one part of the air of the jar is a gas which supports combustion, i.e., oxygen.

$\rule{400}2$

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