How many questions are there in this paper?

This test booklet contains 120 items (questions).

What type of questions are asked in this paper?

Each item comprises four responses (answers), indicating objective-type questions.

Is there any penalty for wrong answers?

Yes, there will be a penalty for wrong answers. One-third of the marks assigned to that question will be deducted as penalty for each wrong answer.

What happens if a candidate gives more than one answer to a question?

If a candidate gives more than one answer, it will be treated as a wrong answer, and there will be a penalty.

Is there any penalty for leaving a question blank?

No, if a question is left blank, there will be no penalty for that question.

Where can candidates find sheets for rough work?

Sheets for rough work are appended in the Test Booklet at the end.

The electronic configuration of an element A is $[Xe]4f^15d^16s^2$ and that of an element B is $[Xe]4f^36s^2$. The elements A and B are

(a) transition element and lanthanide, respectively

(b) lanthanide and actinide, respectively

(c) transition element and actinide, respectively

UPSC Combined Geo-Scientist 2024 Chemistry Paper II Question Paper PDF

Name: UPSC Combined Geo-Scientist 2024 Chemistry Paper II Question Paper PDF
Creator: UPSC
Keywords: Combined Geo-Scientist Preliminary Examination 2024, UPSC Chemistry Paper II, Geo-Scientist 2024 Question Paper, Chemistry Previous Year Paper UPSC, UPSC Exam Paper PDF, Combined Geo-Scientist Exam, 2024 Chemistry Paper, Objective Chemistry Questions, UPSC Geo-Scientist Syllabus, Chemistry Exam Preparation

Central Government Jobs Other Jobs 2024

Year 2024
Conducted By UPSC
Questions 120
Maximum Marks 300
Duration Two Hours
Languages English

Exam Details

Detail	Information
Examination	Combined Geo-Scientist (Preliminary) Examination
Year	2024
Conducting Body	UPSC
Paper	Paper - II Chemistry
Subject	Chemistry
Duration	Two Hours
Maximum Marks	300
Number of Questions	120
Question Type	Objective (MCQ)

This document contains the official question paper for the UPSC Combined Geo-Scientist (Preliminary) Examination 2024, Paper II - Chemistry. The exam, conducted by UPSC, has a maximum of 300 marks and a duration of two hours. It comprises 120 objective-type questions. This paper is crucial for aspirants preparing for the Geo-Scientist examination, offering insights into the exam pattern, difficulty level, and important topics covered in Chemistry. Practicing with previous years' papers like this one is essential for effective preparation.

Major Topics Covered

Quantum Numbers
Degenerate Orbitals
Radial Distribution Plots
Metals
Electronic Configuration
Lanthanides
Actinides
Periodic Properties
Atomic Weight
Atomic Size
Atomic Number
Ionic Radii
Effective Nuclear Charge
Slater's Rule
Catenation

Why This Paper is Important

Useful for Combined Geo-Scientist (Preliminary) Exa 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 (Preliminary) Examination 2023 Chemistry Paper II
Combined Geo-Scientist (Main) Examination 2024 Chemistry Paper
UPSC ESE 2024 Chemistry Optional Paper
Combined Geo-Scientist (Preliminary) Examination 2024 Chemistry Paper II Answer Key
Combined Geo-Scientist (Preliminary) Examination Syllabus
UPSC Chemistry Syllabus for Competitive Exams
Combined Geo-Scientist (Preliminary) Examination Pattern
UPSC Exam Pattern for Scientific Posts

Instructions

IMMEDIATELY AFTER THE COMMENCEMENT OF THE EXAMINATION, YOU SHOULD CHECK THAT THIS TEST BOOKLET DOES NOT HAVE ANY UNPRINTED OR TORN OR MISSING PAGES OR ITEMS, ETC.
IF SO, GET IT REPLACED BY A COMPLETE TEST BOOKLET.
Please note that it is the candidate's responsibility to encode and fill in the Roll Number and Test Booklet Series A, B, C or D carefully and without any omission or discrepancy at the appropriate places in the OMR Answer Sheet.
Any omission/discrepancy will render the Answer Sheet liable for rejection.
You have to enter your Roll Number on the Test Booklet in the Box provided alongside.
DO NOT write anything else on the Test Booklet.
This Test Booklet contains 120 items (questions).
Each item comprises four responses (answers).
You will select the response which you want to mark on the Answer Sheet.
In case you feel that there is more than one correct response, mark the response which you consider the best.
In any case, choose ONLY ONE response for each item.
You have to mark your responses ONLY on the separate Answer Sheet provided. See directions in the Answer Sheet.
Before you proceed to mark in the Answer Sheet the response to various items in the Test Booklet, you have to fill in some particulars in the Answer Sheet as per instructions sent to you with your Admission Certificate.
After you have completed filling in all your responses on the Answer Sheet and the examination has concluded, you should hand over to the Invigilator only the Answer Sheet.
You are permitted to take away with you the Test Booklet.
Sheets for rough work are appended in the Test Booklet at the end.
Penalty for wrong answers : THERE WILL BE PENALTY FOR WRONG ANSWERS MARKED BY A CANDIDATE.

Questions (page 2)

Q1. Which among the following principal quantum numbers has/have five degenerate d-orbitals?

(a) 2
(b) 3 only
(c) 4 only
(d) Both 3 and 4

Q2. Which one of the following statements related to radial distribution plots for hydrogen atom is not correct?

(a) Most probable radius varies as 3s > 3p > 3d.
(b) Most probable radius varies as 1s < 2s < 3s.
(c) Most probable radius varies as 2p < 3p.
(d) Most probable radius varies as 3s < 3p < 3d.

Q3. Which one of the following sets of quantum numbers represents the highest energy state?

(a) n 4, l 0, m_l 0, m_s +½
(b) n 3, l 0, m_l 0, m_s -½
(c) n 3, l 1, m_l 1, m_s +½
(d) n 3, l 2, m_l 1, m_s -½

Q4. Which one of the following groups of elements contains true metals only?

(a) Carbon, boron, silicon
(b) Magnesium, aluminium, selenium
(c) Boron, carbon, nitrogen
(d) Sodium, thallium, bismuth

Q5. The electronic configuration of an element A is [Xe]4f^15d^16s² and that of an element B is [Xe]4f^36s². The elements A and B are

(a) transition element and lanthanide, respectively
(b) lanthanide and actinide, respectively
(c) transition element and actinide, respectively
(d) both lanthanides

Q6. The physical and chemical properties of elements are periodic functions of their

(a) atomic weight
(b) atomic size
(c) atomic number
(d) atomic shape

Q7. Which one of the following represents the correct order of ionic radii among Y³⁺, La³⁺, Eu³⁺ and Lu³⁺?

(a) Y^{3+} < La^{3+} < Eu^{3+} < Lu^{3+}
(b) Lu^{3+} < Eu^{3+} < La^{3+} < Y^{3+}
(c) Eu^{3+} < La^{3+} < Lu^{3+} < Y^{3+}
(d) Lu^{3+} < Y^{3+} < Eu^{3+} < La^{3+}

Q8. Using Slater's rule, the effective nuclear charge experienced by 3d-electron in titanium (atomic number 22) is

(a) 22.0
(b) 7.53
(c) 5.14
(d) 3.65

Q9. Atomic size of nitrogen is less than carbon atom, yet carbon shows maximum catenation property while nitrogen does not. The reason for this is

(a) lone pair-lone pair repulsions in N-N single bond make the bond weaker to allow catenation
(b) catenation is not dependent on atomic size
(c) carbon has poor multiple bonds formation ability
(d) nitrogen exists as an inert gas and therefore does not react

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Frequently asked questions

What is the name of the examination?

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

Which year is this question paper for?

This question paper is for the year 2024.

Who conducts the Combined Geo-Scientist Examination?

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

What is the subject of Paper II?

Paper II is for Chemistry.

What is the total maximum marks for this paper?

The maximum marks for this paper are 300.

What is the time duration allowed for the examination?

The time allowed for the examination is Two Hours.

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