UPSC Combined Geo-Scientist (Main) Examination 2025 – Download Question Papers (Geology, Geophysics & Chemistry)
The Union Public Service Commission (UPSC) has officially conducted the Combined Geo-Scientist (Main) Examination 2025, one of India’s most prestigious scientific recruitment exams for you are in the field of Geology, Geophysics, Hydrogeology, and Chemistry.
If you are a science or earth science graduate aspiring for a Group ‘A’ Gazetted Officer post in the Geological Survey of India (GSI) or the Central Ground Water Board (CGWB), this article gives you direct download links for all official question papers (Paper I, II & III) for 2025.
These PDFs will help you analyze the exam pattern, question trends, and difficulty levels — and plan your preparation for the next attempt, UPSC Geo-Scientist 2026.
Overview – UPSC Combined Geo-Scientist (Main) Examination 2025
| Particulars | Details |
|---|---|
| Exam Name | UPSC Combined Geo-Scientist (Main) Examination 2025 |
| Conducting Body | Union Public Service Commission (UPSC) |
| Category | Scientific / Technical Government Jobs |
| Posts Offered | Geologist, Geophysicist, Chemist, Hydrogeologist |
| Departments | Geological Survey of India (GSI) & Central Ground Water Board (CGWB) |
| Exam Mode | Descriptive (Written Examination) |
| Total Marks | 600 (Mains) + 200 (Personality Test) |
| Official Website | https://upsc.gov.in |
| Exam Date (Expected) | June 21–23, 2025 |
UPSC Combined Geo-Scientist Exam Structure
The Geo-Scientist (Main) Examination consists of three descriptive papers for each discipline.
If you have clear the Preliminary Exam you are eligible to appear for the Main Exam, and successful you are proceed to the Personality Test.
| Paper | Subject | Marks | Duration |
|---|---|---|---|
| Paper I | Discipline-Specific Subject (Part I) | 200 | 3 Hours |
| Paper II | Discipline-Specific Subject (Part II) | 200 | 3 Hours |
| Paper III | Discipline-Specific Subject (Part III) | 200 | 3 Hours |
| Total | — | 600 Marks | — |
Geology (Paper I, II & III)
The Geology papers assess you are in theoretical knowledge, field application, and conceptual clarity in Earth Science fundamentals.
It is one of the most competitive sections, aimed at selecting candidates for Geologist Group ‘A’ posts in the Geological Survey of India.
Key Areas Covered in Geology Papers
Paper I – General Geology, Geomorphology & Remote Sensing
- Earth Structure, Plate Tectonics, and Seismology
- Geological Time Scale and Stratigraphy
- Aerial Photography, Satellite Imagery, and GIS
- Geomorphological Mapping
Paper II – Mineralogy, Petrology & Economic Geology
- Crystallography and Optical Mineralogy
- Igneous, Metamorphic, and Sedimentary Rocks
- Ore Minerals, Indian Mineral Deposits, and Prospecting Methods
Paper III – Applied Geology & Hydrogeology
- Engineering Geology
- Groundwater Exploration and Aquifer Mapping
- Environmental Geology and Disaster Risk
- Geological Field Techniques and Mapping
Download Geology Question Papers (2025)
| Paper | Download Link | Source |
|---|---|---|
| Geology Paper I (2025) | Download PDF (Official) | UPSC Official Website |
| Geology Paper II (2025) | Download PDF (Official) | UPSC Official Website |
| Geology Paper III (2025) | Download PDF (Official) | UPSC Official Website |
Geology 2025 – Difficulty Review
| Paper | Level | Focus Area |
|---|---|---|
| Paper I | Moderate | Mapping & Remote Sensing Questions |
| Paper II | Tough | Petrology & Mineral Identification |
| Paper III | Moderate | Hydrogeology & Applied Concepts |
Overall: Conceptually Moderate but Application-Focused
Hydrogeology
Hydrogeology is a specialized paper designed for CGWB (Central Ground Water Board) aspirants.
It involves concepts related to groundwater flow, aquifer systems, and water resource management.
Core Topics in Hydrogeology
- Groundwater Hydraulics
- Darcy’s Law, Aquifer Properties, and Well Hydraulics
- Groundwater Chemistry & Pollution
- Artificial Recharge & Watershed Management
- Hydrogeological Mapping
Download Hydrogeology Paper (2025)
| Paper | Download Link | Source |
|---|---|---|
| Hydrogeology Paper (2025) | Download PDF (Official) | UPSC Official Website |
Hydrogeology 2025 – Analysis
| Section | Difficulty | Comment |
|---|---|---|
| Groundwater Flow | Moderate | Concept-based, numericals on Darcy’s Law |
| Water Quality | Easy–Moderate | Basic hydrochemistry |
| Aquifer Management | Moderate | Case-study-based questions |
Overall: Balanced and Conceptual
Geophysics (Paper I, II & III)
The Geophysics stream tests your understanding of Earth’s internal structure, seismic methods, and electromagnetic field theory.
It combines physics principles with Earth science applications for real-world problem-solving in exploration and resource mapping.
Key Areas Covered
Paper I – Solid Earth Geophysics
- Seismology, Gravimetry, Magnetometry
- Plate Tectonics, Crustal Dynamics
- Heat Flow and Radioactivity
Paper II – Geophysical Prospecting
- Electrical, Magnetic, Gravity, and Seismic Methods
- Well Logging Techniques
- Resistivity & Induced Polarization
Paper III – Nuclear Geophysics & Digital Signal Processing
- Radiometric Techniques
- Electromagnetic Waves & Remote Sensing
- Signal Filtering, Spectral Analysis, Data Processing
Download Geophysics Question Papers (2025)
| Paper | Download Link | Source |
|---|---|---|
| Geophysics Paper I (2025) | Download PDF (Official) | UPSC Official Website |
| Geophysics Paper II (2025) | Download PDF (Official) | UPSC Official Website |
| Geophysics Paper III (2025) | Download PDF (Official) | UPSC Official Website |
Geophysics 2025 – Difficulty Review
| Paper | Level | Remarks |
|---|---|---|
| Paper I | Moderate | Conceptual questions on Seismology |
| Paper II | Tough | Field data interpretation |
| Paper III | Moderate–Hard | Numerical-heavy on DSP & EM theory |
Overall: Challenging for non-physics backgrounds
Chemistry (Paper I, II & III)
Chemistry papers are meant for Chemist Group ‘A’ positions in the Geological Survey of India (GSI) and test knowledge of analytical, inorganic, organic, and physical chemistry.
Key Topics Covered
Paper I – Physical Chemistry
- Thermodynamics, Chemical Kinetics, Electrochemistry
- Quantum Chemistry and Spectroscopy
Paper II – Inorganic Chemistry
- Coordination Chemistry, Bioinorganic Compounds
- Organometallics and Nuclear Chemistry
Paper III – Analytical & Organic Chemistry
- Chromatography, Spectrophotometry, and NMR
- Organic Reaction Mechanisms and Stereochemistry
Download Chemistry Question Papers (2025)
| Paper | Download Link | Source |
|---|---|---|
| Chemistry Paper I (2025) | Download PDF (Official) | UPSC Official Website |
| Chemistry Paper II (2025) | Download PDF (Official) | UPSC Official Website |
| Chemistry Paper III (2025) | Download PDF (Official) | UPSC Official Website |
Chemistry 2025 – Sectional Analysis
| Section | Difficulty | Focus |
|---|---|---|
| Physical Chemistry | Moderate | Numerical-based |
| Inorganic Chemistry | Easy–Moderate | Coordination & Structure |
| Organic Chemistry | Tough | Mechanism-heavy questions |
Overall: Conceptual and lengthy paper
Overall Difficulty Level – UPSC Geo-Scientist (Main) 2025
| Discipline | Overall Level | Comments |
|---|---|---|
| Geology | Moderate–Tough | Conceptual & applied questions |
| Geophysics | Tough | Data-driven & numerical-heavy |
| Chemistry | Moderate | Balanced conceptual & application |
| Hydrogeology | Moderate | Practical & conceptual blend |
Preparation Tips for 2026 Based on 2025 Analysis
For Geology:
- Focus on structural geology diagrams & maps.
- Revise Indian stratigraphy & economic geology regularly.
For Geophysics:
- Strengthen mathematical problem-solving.
- Learn field data interpretation techniques.
For Chemistry:
- Revise formulas and reaction mechanisms.
- Practice numerical and graph-based problems.
For Hydrogeology:
- Emphasize groundwater flow equations & aquifer modeling.
Conclusion
The UPSC Combined Geo-Scientist (Main) Examination 2025 Question Papers are the most valuable resources for understanding the real UPSC exam structure and question depth.
By downloading and studying these official PDFs of:
Geology, Geophysics, Hydrogeology, and Chemistry Papers (I, II & III) —
you can:
Identify key topics & weightage areas
Practice actual UPSC-level questions
Refine answer-writing & diagram accuracy
“Those who understand the Earth, shape its future — prepare with precision, practice with purpose.”
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