Indian Forest Service (Mains), Chemistry optional · 2021 · Paper I
Q3(a). Maximum low-pressure slope of Z
Question
At what temperature does the slope of the Z versus P curve as P → 0 have its maximum value for a van der Waals gas? What is the value of the maximum slope?
Model answer
The free solution for 2021 answers questions 1, 2, 4, 5 and 6, the ones picked in its time plan. Question 3 is answered in full in the IFoS Chemistry Paper I, 2021 to 2025 book, with every part of every paper.
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UPSC Indian Forest Service (Main) Chemistry Paper I: Model Answers 2021 to 2025
- All eight questions of each paper, with the question printed above its answer
- Physical chemistry numericals worked with units; inorganic structures drawn
- Topic-wise weightage and a topic-wise index
Coverscompressibility factorvan der Waals gasBoyle temperatureZ versus P slope
All parts of Question 3
- 3(a) Maximum low-pressure slope of Z10 marks
- 3(b) Temperature and decomposition of silver oxide15 marks
- 3(c) Ion-selective and glass electrodes15 marks