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The surface area occupied by a single gas molecule is inversely proportional to the ____________

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The surface area occupied by a single gas molecule is inversely proportional to the ____________

(a) Molar mass of the gas adsorbed

(b) Density of the liquefied gas

(c) Volume of the gas

(d) All of the mentioned

I got this question in unit test.

My question is from B. E. T. Adsorption Isotherm topic in section Criteria of Purity and Characterisation of Materials of Engineering Chemistry I

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The correct option is (b) Density of the liquefied gas

The explanation: The surface area occupied by a single gas molecule is inversely proportional to the density of the liquefied gas. Porous inorganic materials such as mesoporous silica and layered clay minerals have high surface areas of several hundred m^2g^−1 calculated by the BET method.

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