The Union Public Service Commission (UPSC) has officially conducted the Civil Services (Main) Examination 2025, and candidates who selected Chemistry as their optional subject can now access the Chemistry Paper-II Question Paper. This paper is crucial for aspirants aiming to understand the level of conceptual depth, analytical questions, and practical application asked in the Mains. It is now available for download in PDF format, providing an excellent reference for both current and future UPSC aspirants preparing for this demanding exam.
I am sharing this because many aspirants find it difficult to locate the official question papers immediately after the examination. Having the Chemistry Paper-II helps students analyse question trends, understand the examiner’s approach, and identify which topics hold more weight in the UPSC evaluation system. The Chemistry optional has consistently been a scoring subject for candidates with a background in science or engineering, provided they approach it with conceptual clarity and practice. By downloading the 2025 paper, candidates can align their preparation with the actual standard expected by UPSC and avoid relying on incomplete or unreliable online notes.
About the UPSC Civil Services Mains Exam
The Civil Services (Main) Examination is the second and most crucial stage in the UPSC selection process. It tests a candidate’s understanding, analytical ability, and clarity of expression through descriptive papers. Among the nine papers in Mains, two are optional subject papers chosen by the candidate. Chemistry remains a preferred choice for aspirants with a background in science, owing to its objective nature and strong scoring potential.
The Chemistry optional consists of Paper-I and Paper-II, each carrying 250 marks. While Paper-I mainly focuses on inorganic and physical chemistry, Paper-II covers organic and applied chemistry topics that require analytical understanding and a problem-solving approach.
Focus Areas of Chemistry Paper-II
The Chemistry Paper-II evaluates a student’s command over organic and applied chemistry, often blending conceptual and reaction-based questions. Key areas usually covered in this paper include:
- Reaction mechanisms and synthetic applications
- Organic spectroscopy and structure determination
- Organometallic compounds and reagents
- Biomolecules and polymer chemistry
- Analytical and industrial chemistry
- Environmental and green chemistry concepts
Questions are designed to test logical reasoning, reaction sequence prediction, and clarity of thought rather than mere memorisation.
Key Details of the Paper
| Particulars | Information |
|---|---|
| Exam Name | Civil Services (Main) Examination 2025 |
| Conducted by | Union Public Service Commission (UPSC) |
| Paper Name | Chemistry Paper-II |
| Total Marks | 250 |
| Type of Paper | Descriptive |
| Medium | English / Hindi |
| Availability | Downloadable PDF format |
How to Download the Chemistry Paper-II PDF
Aspirants can download the UPSC Civil Services (Main) 2025 Chemistry Paper-II directly from the official UPSC website by following these steps:
- Visit the official UPSC website – www.upsc.gov.in
- Click on the Examination tab
- Select Previous Question Papers from the dropdown list
- Choose Civil Services (Main) Examination 2025
- Look for Chemistry Paper-II under the list of optional subjects
- Click on the download link to save the PDF file
N.B: If you want to download the question paper without any difficulty, you can easily download it by Click here.
Candidates are advised to rely only on official or verified sources to avoid errors or incomplete question sets.


















