Q14(a). BET equation and the surface area of a powdered catalyst
Without derivation, write down the BET equation giving the meanings of the terms. Using BET equation how can one measure the total surface area of a solid catalyst in powder state? Given: cross sectional area of each adsorbed gas molecule is A and m g of solid adsorbent is present.
Model answer
The free solution for 2022 answers questions 1, 2, 3, 4, 6, 7, 10, 12, 13 and 15, the ones picked in its time plan. Question 14 is answered in full in the Geo-Scientist Chemistry Paper II, 2021 to 2025 book, with every part of every paper.
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UPSC Combined Geo-Scientist (Main) Chemistry Paper II: Model Answers 2021 to 2025
- All fifteen questions of each paper, with the question printed above its answer
- Numericals worked from formula to result with units; graphs with labelled axes
- Topic-wise weightage and a topic-wise index
CoversBET equationsurface areamultilayer adsorptionmonolayer volumecatalystadsorption isotherm
All parts of Question 14
- 14(a) BET equation and the surface area of a powdered catalyst10 marks
- 14(b) Pressure of CO₂ from the reduced van der Waals equation10 marks