Under review — part of this question (a structure or an option) is not clear in the source scan. 4AB is checking it against the original book; the answer shown may change.
Among the following figures, the variations of mass adsorbs with pressure for a monolayer and a multilayer are represented by A = Monolayer B Multilayer without condensation C = Multilayer with capillary condensation Therefore, correction answer is (b)
Answer
Under review — not yet confirmed.
Answer: B
The source book printed no answer; this one was worked out and checked — see the explanation.
Explanation
Curve A (saturating) is the Langmuir monolayer isotherm and curve B (steep rise at high pressure) is multilayer adsorption without capillary condensation; C shows capillary condensation. The pair is (b).