UPSC Civil Services (Mains)
Chemistry optional
- 2 papers
- 250 marks each
- 3 h per paper
- 5 of 8 questions, Q1 and Q5 compulsory
Paper I covers physical and inorganic chemistry.
Paper I, physical and inorganic chemistry
Questions by topic
Every part of the 2021 to 2025 papers filed under its syllabus unit: 195 parts and 2000 marks in all. Open a unit to see all its questions, newest first, each on its own page.
- 1 Atomic structure10 parts105 marks
- 2 Chemical bonding14 parts145 marks
- 3 Solid state12 parts125 marks
- 4 The gaseous state and transport phenomenon13 parts115 marks
- 5 Liquid state9 parts75 marks
- 6 Thermodynamics17 parts155 marks
- 7 Phase equilibria and solutions8 parts105 marks
- 8 Electrochemistry15 parts160 marks
- 9 Chemical kinetics13 parts135 marks
- 10 Photochemistry11 parts120 marks
- 11 Surface phenomena and catalysis9 parts100 marks
- 12 Bio-inorganic chemistry11 parts105 marks
- 13 Coordination chemistry28 parts300 marks
- 14 Main group chemistry14 parts140 marks
- 15 General chemistry of 'f' block elements11 parts115 marks
Each part is filed under the one unit it mainly tests. Where a part touches two units, the section it was set in and the wording of the syllabus decide.