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Demonstrate through a simple experiment that the air mainly contains nitrogen and oxygen in the volume ratio of 4: 1.
Aim of experiment: To show that air contains nitrogen and oxygen in the ratio 4 : 1 by volume
Procedure: Take a glass container and fix a candle at its center. Put some quantity of water in the container. Place an empty, dry gas jar over it. Mark five marks above the water surface on the jar at equal distances shown in the figure given below.
The candle is lightened and is covered with a gas jar.
Observation: After some time the candle is extinguished and the water level is raised in gas jar. The raised level in water is 1 / 5 of the volume of air in the gas jar.
Conclusion: This proves that one part of the air of the jar is a gas that supports combustion, i.e., oxygen. Hence, 1/5th of the volume of air is oxygen. Thus, we can conclude that air contains nitrogen and oxygen in a ratio of 4:1.
Updated on: 10-Oct-2022
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