Answers

2015-04-21T10:13:08+05:30
By increasing pressure.
example. water can be distiled out at 50
℃ by increasing pressure.
when you increas the pressure molecules of gas are come closer and become chang the state. also by decreasing temperature. 
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2015-04-21T12:44:28+05:30
Atmospheric gases can be liquefied by increasing pressure.
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