Q.

The critical temperature of carbon dioxide is 304.3 K Which statement is true about the behaviour of carbon dioxide above this temperature?

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a

Liquid carbon dioxide does not exist above this temperature

b

Liquid and gaseous carbon dioxide are in equilibrium above this temperature.

c

Solid, liquid and gaseous carbon dioxide are in equilibrium above this temperature

d

Carbon dioxide molecules do not exist above this temperature.

answer is C.

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Detailed Solution

At one atmosphere and above that temperature, it is a gas. At one atmosphere, there is no liquid phase.

So, option C is correct.

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