What is the paper code mentioned on the paper?

The paper code mentioned is SDFG-T-CHM.

What is the exam stage for this paper?

This paper is for the Main examination stage.

In which language should the answers be written?

Answers must be written in English only.

How many sections are there in the paper?

There are two sections in the paper: Section A and Section B.

How many questions must a candidate attempt in total?

A candidate has to attempt six questions in all.

Are there any compulsory questions?

Yes, Question No. 1 in Section A and Question No. 6 in Section B are compulsory.

How are the remaining questions to be answered?

Of the remaining questions, candidates have to answer four questions, choosing two from each section.

Combined Geo-Scientist Main 2023 Chemistry Paper III PDF

Name: Combined Geo-Scientist Main 2023 Chemistry Paper III PDF
Creator: UPSC
Keywords: Combined Geo-Scientist Main 2023, Chemistry Paper III, UPSC Exam Paper, Geo-Scientist Chemistry, 2023 Question Paper, Analytical Chemistry Questions, Spectroscopy Exam, Chromatography Paper, Main Exam Chemistry, UPSC Main Exam, Chemistry Paper PDF, Geo-Scientist Syllabus, Previous Year UPSC, Exam Preparation Material, Central Govt Jobs

Central Government Jobs Other Jobs 2023

Year 2023
Conducted By UPSC
Maximum Marks 200
Duration Three Hours
Languages English

Exam Details

Detail	Information
Examination	Combined Geo-Scientist (Main) Examination
Year	2023
Conducting Body	UPSC
Paper	Chemistry Paper - III
Subject	Chemistry
Duration	Three Hours
Maximum Marks	200
Question Type	Descriptive / Subjective

The Combined Geo-Scientist (Main) Examination 2023 Chemistry Paper III question paper, conducted by UPSC, is a crucial resource for aspirants. This paper, carrying a maximum of 200 marks and a duration of Three Hours, tests candidates' in-depth knowledge of Chemistry. It is divided into two sections, with specific compulsory questions and a requirement to answer a selection from the remaining. Understanding the structure and content of this paper is vital for effective preparation and achieving success in the examination.

Major Topics Covered

Analytical Chemistry
Chromatography
Spectroscopy
Atomic Absorption Spectroscopy
Inductively Coupled Plasma Mass Spectrometry
X-ray Fluorescence
Thermogravimetry
Type Metal Analysis

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

Combined Geo-Scientist (Main) Examination 2023 - Paper I
Combined Geo-Scientist (Main) Examination 2023 - Paper II
Combined Geo-Scientist (Main) Examination 2022 - Chemistry Paper III
Combined Geo-Scientist Main 2023 Chemistry Paper III Answer Key
Combined Geo-Scientist Main Chemistry Syllabus
UPSC Chemistry Syllabus for Main Exam
Combined Geo-Scientist Main Exam Pattern
UPSC Exam Pattern for Geo-Scientist

Instructions

The SECTORS AND THE CONTROL S There are TEN questions divided under TWO sections.
Candidate has to attempt SIX questions in all.

Questions (page 2)

Section A

Q1.

(a) The following results were obtained in the replicate determinations of Fe content in a mineral ore (in mg):
10.5, 10.6, 10.3, 10.6, 10.2, and 10.4.
Calculate the relative standard deviation (RSD) of this data.

(b) (i) What types of analyte can be separated by HPLC but not by GLC ?

(ii) What is the range of particle size used as stationary phase packing material in most packed GLC columns?

(d) What is the advantage and disadvantage of GF-AAS as compared to Flame-AAS ?

(e) How is temperature axis in thermogravimetry method calibrated ?

(f) How do K & L X-ray peaks of an element originate in XRF method ? Give a typical labelled wavelength dispersive XRF spectrum showing K_α & K_β peaks of an element, e.g. Zn.

(g) How does high concentration of calcium interfere with ICP-MS analysis of iron ?

(h) What are the major constituents of type metal ? Suggest a method for non-destructive analysis of the constituents in type metal. (Description of the method is not required)

Section A

Q2.

(a) An analyte was estimated in the ppb to ppm range in a 1 \, μ L sample. Comment on the type of analysis as per sampling protocol.

(b) A chromatographic column is tested and found to produce a peak having a Gaussian shape and a width of 25 sec at a retention time of 35 min. How many theoretical plates does the column have under the conditions of the test? If the column described above is 3 m long, what is the height equivalent to a theoretical plate (HETP) in this case?

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Frequently asked questions

What is the name of the examination?

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

What is the year of this question paper?

This question paper is from the year 2023.

Which subject does this paper cover?

This paper covers Chemistry, specifically Paper III.

Who conducts the Combined Geo-Scientist Examination?

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

What is the maximum marks for Chemistry Paper III?

The maximum marks for Chemistry Paper III is 200.

What is the time allowed for this paper?

The time allowed for this paper is Three Hours.

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