UPSC Combined Geo-Scientist 2025 Geology Paper III Question Paper PDF

Central Government Jobs Other Jobs 2025

  • Year 2025
  • Conducted By UPSC
  • Maximum Marks 200
  • Duration Three Hours
  • Languages English

Exam Details

Detail Information
Examination UPSC Combined Geo-Scientist (Main) Examination
Year 2025
Conducting Body UPSC
Paper Geology Paper - III
Subject Geology
Duration Three Hours
Maximum Marks 200
Question Type Descriptive / Subjective

This document contains the question paper for the UPSC Combined Geo-Scientist (Main) Examination 2025, specifically Geology Paper - III. The paper is designed for candidates who have cleared the preliminary stage and are appearing for the main examination. It consists of descriptive questions divided into six sections, with a compulsory Section-A and the need to attempt five questions from the remaining five sections. The paper assesses in-depth knowledge of various geological concepts, including mineralogy, ore bodies, geochemistry, and basin analysis. This question paper is a crucial resource for aspirants preparing for the UPSC Geo-Scientist exam, providing insights into the exam pattern, difficulty level, and key topics.

Major Topics Covered

  • Ilmenite-magnetite exsolution lamellae
  • Pyrolusite vs. Cryptomelane-Psilomelane
  • Mineral conservation
  • Mica deposits and production in India
  • Geological anomalies
  • Black shales in metallogenesis
  • Secondary migration of oil
  • Coal of Wardha Basin
  • Earth's radiation budget
  • Carbon capture and storage geological formations
  • Oxidation and supergene sulphide enrichment
  • Stability of sulphide minerals (pH and Eh)
  • Role of iron in gossan
  • Limonite boxworks
  • Syngenetic and epigenetic ore bodies
  • Replacement textures
  • Zawar Pb-Zn mineralization

Why This Paper is Important

  • Useful for UPSC Combined Geo-Scientist (Main) Exami preparation
  • Helps understand the latest exam pattern
  • Useful for practice and self-assessment
  • Covers frequently asked General Studies topics
  • Helpful for analysing question trends

Related Resources

  • UPSC Combined Geo-Scientist (Main) Examination 2024 Geology Paper III
  • UPSC Combined Geo-Scientist (Main) Examination 2023 Geology Paper III
  • UPSC Combined Geo-Scientist (Main) Examination 2025 Geology Paper I
  • UPSC Combined Geo-Scientist (Main) Examination 2025 Geology Paper II
  • UPSC Combined Geo-Scientist (Main) 2025 Geology Paper III Answer Key
  • Geo-Scientist 2025 Geology Paper III Solutions
  • UPSC Combined Geo-Scientist Main Syllabus
  • UPSC Geo-Scientist Geology Syllabus

Instructions

  • There are ELEVEN questions divided under SIX Sections.
  • Candidate has to attempt SIX questions in all.
  • The ONLY question in Section-A is compulsory.
  • Out of the remaining TEN questions, the candidate has to attempt FIVE, choosing ONE from each of the other Sections B, C, D, E and F.
  • The number of marks carried by a question/part is indicated against it.
  • Unless otherwise mentioned, symbols, abbreviations and notations have their usual standard meanings.
  • Neat sketches are to be drawn to illustrate answers, wherever required.
  • They shall be drawn in the space provided for answering the question itself.
  • Wherever required, graphs/tables are to be drawn on the Question-cum-Answer Booklet itself.
  • Attempts of questions shall be counted in sequential order.
  • Unless struck off, attempt of a question shall be counted even if attempted partly.
  • Any page or portion of the page left blank in the Question-cum-Answer Booklet must be clearly struck off.
  • Answers must be written in ENGLISH only.

Questions (page 2)

Section A

Q1. Describe the following in brief with neat labelled diagrams, wherever necessary :

(a) Ilmenite-magnetite exsolution lamellae formation mechanism

(b) Physical and optical characters that differentiate pyrolusite from cryptomelane-psilomelane

(c) Conservation of minerals

(d) Status of India w.r.t. mica deposits and production

(e) Causes of non-significant and lateral anomalies

(f) Significance of black shales in metallogenesis

(g) Secondary migration of oil

(h) Main attributes of the coal of Wardha Basin

(i) Earth's radiation budget

(j) Suitable geological formations for carbon capture and storage

Section B

Q2. What are the main chemical reactions involved in oxidation and supergene sulphide enrichment processes? How do pH and Eh affect the stability of sulphide minerals? What is the role of iron in gossan? How are the various types of limonite boxworks useful?

(a) sulphide enrichment processes? How do pH and Eh affect the stability of sulphide minerals? What is the role of iron in gossan? How are the various types of limonite

(b) boxworks useful? Discuss the various forms of syngenetic and epigenetic ore bodies.

Section B

Q3. Discuss the various forms of syngenetic and epigenetic ore bodies. Discuss the various types of replacement textures and their paragenetic significance. Describe the origin and evolution of Zawar Pb-Zn mineralization in Rajasthan.

(a) Discuss the various types of replacement textures and their paragenetic

(b) significance. Describe the origin and evolution of Zawar Pb-Zn mineralization in Rajasthan.

(c) \boldsymbol2

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UPSC Combined Geo-Scientist (Main) Examination 2025 Geology Paper III page 1 instructions scan PDF download
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Frequently asked questions

What is the name of the examination?

The examination is the UPSC Combined Geo-Scientist (Main) Examination.

What is the year of this question paper?

This question paper is from the 2025 examination.

Which paper is this?

This is Geology Paper - III.

Who conducts the Geo-Scientist examination?

The examination is conducted by the Union Public Service Commission (UPSC).

What is the question paper type for Geology Paper - III?

Geology Paper - III is a descriptive type of question paper.

What is the language of the answers?

Answers must be written in English only.

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