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Question

An ideal gas as compared to a real gas at very high pressure occupies :

A
more volume
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B
less volume
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C
same volume
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D
unpredictable behaviour
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Solution

The correct option is A more volume
Ideal gas molecules don’t have any force of repulsion or attraction between them. But in case of real gases, there exist both repulsive and attractive forces.
When there is high pressure, there is less distance between any two neighbouring gas molecules. As the gas molecules come nearer, the force of repulsion between electrons of both molecules and nucleus of both molecules increases. As a result, it occupies higher volume compared to ideal gas in which there is no repulsion force.

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