Statement :1 If V is molar volume of gas and gas obeys vander waals’s equation, at high pressure the y- intercept of the plot PV (Y-axis) vs P(X-axis) is RT Statement: 2 Compressibility factor of He and H2 is more than 1 in almost entire pressure range

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Statement :1 If V is molar volume of gas and gas obeys vander waals’s equation, at high pressure the y- intercept of the plot PV (Y-axis) vs P(X-axis) is RT
Statement: 2 Compressibility factor of He and H₂ is more than 1 in almost entire pressure range

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First statement is correct and second statement is wrong

Both statements are wrong

Both statements are correct.

First statement is wrong and second statement is correct

answer is A.

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Detailed Solution

At high P,Z $Z = 1 + \frac{P b}{R T} = \frac{P V}{R T}$
PV vs P, slope =b, intercept =RT
Vander waals Constant “a” values are negligible & neglected (for $H_{2} & H e$ ) in comparison with a values of other gases.