Chemistry Paper I (2020) - Combined Geo-Scientist Main
- Year 2020
- Questions 11
- Maximum Marks 200
- Duration Three Hours Maximum Marks: 200
- Languages English
Exam Details
| Detail | Information |
|---|---|
| Examination | Combined Geo-Scientist (Main) Examination |
| Year | 2020 |
| Paper | Chemistry Paper - I |
| Subject | Chemistry |
| Duration | Three Hours Maximum Marks: 200 |
| Maximum Marks | 200 |
| Number of Questions | 11 |
| Question Type | Mixed |
Page 1 provides exam metadata for the Chemistry Paper I of the 2020 Combined Geo-Scientist (Main) Examination (3 hours, 200 marks). Page 2 (Section A) contains a set of 10 subparts under Q1, focusing on inorganic chemistry, analytical chemistry, and radiochemical concepts (spinel structures, trans effect, titration methods, EDTA, masking, and isotopes). The OCR has been repaired to present one Q1 with multiple descriptive subparts.
Major Topics Covered
- Spinel structure
- Inverse vs normal spinel
- Trans effect
- Boric acid titration
- NaOH titration
- Oxine and aluminium oxinate
- Iodometry vs iodimetry
- EDTA titration with solochrome black indicator
- Masking and demasking in complexometric titration
- Triiron dodecarbonyl
- M–M bonds in metal carbonyls
- Isotopes and radiochemistry of iodine
- Transition elements concepts
- CuCl as a transition metal compound
- Complexometric titration
Why This Paper is Important
- Useful for Combined Geo-Scientist (Main) Examinatio 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
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- Chemistry Paper-III 2024 – Combined Geo-Scientist Main MCQ
- UPSC Combined Geo-Scientist Main 2024 Chemistry Paper II PDF
- UPSC Combined Geo-Scientist 2024 Chemistry Paper I PDF
- Geo-Physics Paper III (2024) - Central Geo-Scientist Exam
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 \mu part is indicated against it.
- Neat sketches are to be drawn to illustrate answers, wherever required.
- These shall be drawn in the space provided for answering the question itself.
- Unless otherwise mentioned, symbols and notations have their usual standard meanings.
- Assume suitable data, if necessary, and indicate the same clearly.
- Attempts of questions shall be counted in sequential order.
- Unless struck off, attempt of \alpha 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)
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Frequently asked questions
What is the exam name?
Combined Geo-Scientist (Main) Examination.
Which paper is described here?
Chemistry Paper I.
In which year was this exam held?
2020.
What is the duration of the exam?
Three hours.
What is the maximum marks for Chemistry Paper I?
200 marks.
How many questions are in Section A?
Section A contains a series of subparts under Q1 totaling multiple items; the page shows 10 subparts for Q1 in this OCR repair.