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Question
Which among the following gases is easily liquefied?
Options
Oxygen
Ammonia
Hydrogen
Helium
MCQ
Solution
Ammonia
Explanation:
When the temperature of a gas falls below the critical point, it can be liquefied by cooling or compressing it. Gases with high critical temperatures, such as CH and NH3, can be liquefied simply by applying a sufficient amount of pressure.
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Liquefaction of Gases and Critical Constant
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