The Combined Geo-Scientist Examination 2026 syllabus varies by post. Preliminary Examination has common general papers, while Mains papers are highly specialised. Below is the complete subject-wise breakdown.
Preliminary Examination Syllabus
| Paper | Subject | Topics |
|---|---|---|
| Paper I | General Studies | General Science, Indian History, Geography, Indian Polity, Economy, Current Affairs, Environment |
| Paper II | Geology / Applied Geology / Hydrogeology / Chemistry / Applied Geophysics | As per the post applied for (specialisation-based) |
Main Examination Syllabus – Geology (GSI)
| Paper | Topics |
|---|---|
| Paper I | General Geology, Geomorphology, Remote Sensing, Stratigraphy of India, Palaeontology, Structural Geology |
| Paper II | Mineralogy, Petrology (Igneous, Sedimentary, Metamorphic), Geochemistry, Economic Geology, Mining Geology |
| Paper III | Hydrogeology, Engineering Geology, Environmental Geology, Geohazards, Photogeology |
Main Examination Syllabus – Geophysics (GSI)
| Paper | Topics |
|---|---|
| Paper I | Applied Mathematics, Mechanics, Electricity & Magnetism, Electronics & Instrumentation |
| Paper II | Geodesy, Gravity & Magnetics, Seismology, Electrical Geophysics, Airborne Surveys |
| Paper III | Seismic Exploration, Well Logging, Mathematical Geophysics, Geophysical Inversion, Remote Sensing |
Main Examination Syllabus – Chemistry (GSI)
| Paper | Topics |
|---|---|
| Paper I | Analytical Chemistry (Classical & Instrumental), Physical Chemistry, Chemical Thermodynamics |
| Paper II | Inorganic Chemistry, Organic Chemistry, Spectroscopy |
| Paper III | Environmental Chemistry, Geochemistry, Industrial Chemistry, Polymer & Forensic Chemistry |
Main Examination Syllabus – Junior Hydrogeologist (CGWB)
| Paper | Topics |
|---|---|
| Paper I | Physical Geology, Structural Geology, Stratigraphy, Geomorphology, Remote Sensing |
| Paper II | Hydrogeology, Groundwater Exploration, Well Hydraulics, Water Quality, Isotope Hydrology |
| Paper III | Environmental Geology, Climate Change & Water Resources, GIS Applications, Water Management |