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Question

The temperature to which a gas must be cooled before it can be liquefied by pressure alone is called its


A
Critical temperature
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B
Saturation point
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C
Boiling point
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D
Freezing point
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Solution

The correct option is A Critical temperature
$$Answer:-$$ A
In this P-V curve the isotherm having $$T_c$$ is that critical temperature and corresponding to that there is critical pressure $$P_c$$ .

Critical temperature is the temperature of a gas in its critical state, above which it cannot be liquefied by pressure alone.
Critical pressure is the pressure of a gas or vapour in its critical state.

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Physics

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