A) \[C{{O}_{2}}\]cannot be liquefied
B) can be liquefied with increase of pressure
C) can be liquefied with decrease of pressure
D) can be liquefied if temperature of\[C{{O}_{2}}\]is decreased below\[31.2{}^\circ C\]
Correct Answer: B
Solution :
Gasses cannot be liquified above critical temperature but at high pressure they can be.
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