1.

Assertion: At high pressure, the compression factor Z is (1+(Pb)/(RT)) Reason : At high pressure vander Waals' equation is modified as P(V-b) = RT.

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If both assertion and reason are true and the reason is correct explanation of the assertion.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
If assertion is true but reason is false.
If the assertion and reason both are false

Solution :Vander Waal's EQUATION is
`(P+(a)/(V^(2)))(V-b)=RT`
at high pressure`P(V-b)=RTimplies PV-PB=RT`
`IMPLIES (PV)/(RT)=(1+(Pb)/(RT))`
if `(PV)/(RT) = Z,` then`Z=(1+(Pb)/(RT))`.


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