Match Column I with Column II.
Column I
Column II
(A) At low pressure
(P) $Z = 1 + P b / (RT)$
(B) At high pressure
(Q) $Z = 1 - a / (V_{m} RT)$
(C) At low density
(R) More compressible than ideal gas
(D) H₂,He at 0°C
(S) Repulsive interactions dominate

(T) Harder to compress than ideal gas

Question

Match Column I with Column II.

Column I	Column II
(A) At low pressure	(P) $Z = 1 + P b / (RT)$
(B) At high pressure	(Q) $Z = 1 - a / (V_{m} RT)$
(C) At low density	(R) More compressible than ideal gas
(D) H₂,He at 0°C	(S) Repulsive interactions dominate
	(T) Harder to compress than ideal gas

TestHub · Accepted Answer

At low pressure or low density, attraction gives Z≈1-a/(V_mRT)<1 and easier compression: A,C match Q,R. At high pressure, excluded-volume repulsion gives Z≈1+Pb/(RT)>1 and harder compression: B matches P,S,T. H₂ and He at 0°C have the positive-deviation behaviour used by the source, so D matches P,S,T.

Chemistry - Real Gas Question with Solution | TestHub

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