Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion: At high pressure, the compression factor Z is \[\left( 1+\frac{Pb}{RT} \right)\]. Reason: At high pressure van der Waals equation is modified as \[P(V-b)=RT\].A) If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C) If Assertion is true but Reason is false.
D) If both Assertion and Reason are false.
Correct Answer: A
Solution :
van der Waals equation is \[\left( P+\frac{a}{{{V}^{2}}} \right)(V-b)=RT\] at high pressure \[P(V-b)=RT\] \[PV-Pb=RT\] \[\frac{PV}{RT}=\left( 1+\frac{Pb}{RT} \right)\] if \[\frac{PV}{RT}=Z\], then \[Z=\left( 1+\frac{Pb}{RT} \right)\]
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