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Foure gases P, Q, R and S have almost sa...

Foure gases P, Q, R and S have almost same values of 'b' but their 'a' values (a, b are Vander Waals Constants) are in the order `QltRltSltP`. At a particular temperature, among the foure gases the most easily liquefiable one is

A

P

B

Q

C

R

D

S

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