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Assertion: At critical point, the densities of substance in gaseous and liquid states are same.

Reason: Critical temperature is the temperature at which the real gas exhibit ideal behaviour for considerable range of pressure

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

1 Answer

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Best answer

Correct option  (c) A is true but R is false

Explanation:

Temperature at which the real gas exhibits ideal behaviour for considerable range of pressure is known as Boyle's temperature Tb = a/bR where a and b are van der Waals' constant. Critical temperature is the temperalure above which the gas cannot be liquefied, how so ever high pressure may be applied : Tc = 8a/27Rb.

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