UPSC Combined Geo-Scientist 2021 Chemistry Paper II PDF

Central Government Jobs Other Jobs 2021

  • Year 2021
  • Conducted By UPSC
  • Languages English

Exam Details

Detail Information
Examination Combined Geo-Scientist (Preliminary) Examination
Year 2021
Conducting Body UPSC
Paper Paper-II Chemistry
Subject Chemistry
Question Type Objective (MCQ)

This is the question paper for the UPSC Combined Geo-Scientist (Preliminary) Examination 2021, Paper-II, focusing on Chemistry. It is an objective-type paper designed to assess candidates' knowledge in the subject. Aspirants can use this paper to understand the exam's difficulty level, question patterns, and important topics covered. Practicing with previous years' papers like this one is crucial for effective preparation and improving performance in the competitive examination.

Major Topics Covered

  • Atomic Structure
  • Quantum Numbers
  • Electron Configuration
  • Periodic Properties
  • Ionic Radii
  • Hydration
  • Diagonal Relationship
  • Lanthanides
  • Transition Elements
  • Inert Gases
  • Arc Welding
  • Dipole Moment
  • Magnetic Behavior
  • Nitric Oxide
  • Ionic Character

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 2020 Paper-II Chemistry
  • Combined Geo-Scientist (Preliminary) Examination 2022 Paper-II Chemistry
  • UPSC Engineering Services Examination 2021 Mechanical Engineering Paper I
  • UPSC Civil Services Examination 2021 General Studies Paper I
  • Combined Geo-Scientist (Preliminary) Examination 2021 Answer Key Paper-II Chemistry
  • Combined Geo-Scientist (Preliminary) Examination Syllabus
  • UPSC Chemistry Syllabus for Competitive Exams
  • Combined Geo-Scientist (Preliminary) Examination Pattern

Instructions

  • The number of radial nodes for 2s, 3p and 3d orbitals, respectively are: (a) 2, 1, 0 (b) 2, 1, 1 (c) 1, 0, 0 (d) 1, 1, 0
  • What fraction of the total number of electrons is in the p-sublevels in Iron (Fe)?
  • Which is the correct order of degree of hydration among the following ions?

Questions (page 2)

Q7. Which one of the following represents the correct order of ionic radii among K^+, S^{2-}, Cl^- and Ca^{2+}?

  • (a) Ca^{2+} > K^+ > Cl^- > S^{2-}
  • (b) S^{2-} > CI^{-} > K^{+} > Ca^{2+}
  • (c) Cl^{-} > S^{2-} > K^{+} > Ca^{2+}
  • (d) K^+ > Ca^{2+} > S^{2-} > Cl^-

Q8. The dipole moments of H-C=CC-Cl, CO and HCl are in the directions:

  • (a) leftarrow, leftarrow and leftarrow respectively
  • (b) leftarrow, leftarrow and
    ightarrow respectively
  • (c)
    ightarrow,
    ightarrow and
    ightarrow respectively
  • (d) leftarrow,
    ightarrow and leftarrow respectively

Q9. Consider the following pairs of species of oxygen and their magnetic behavior:

  • (1) O2^-, O2^{2-}
    ightarrow Both diamagnetic
  • (2) O2^+, O2^{2-}
    ightarrow Both paramagnetic
  • (3) O2^+, O2^-
    ightarrow Both paramagnetic
  • (4) O, O2^{2-}
    ightarrow Both paramagnetic
  • (a) 1 only
  • (b) 1 and 2
  • (c) 3
  • (d) 2 and 4

Q10. Consider the following statements regarding the properties of Nitric oxide (NO):

  • (1) Nitric oxide gas is paramagnetic but liquid nitric oxide is diamagnetic
  • (2) Nitric oxide gas is diamagnetic but liquid nitric oxide is paramagnetic
  • (3) Nitric oxide is a neutral oxide and is not an acid anhydride
  • (a) 1 and 3
  • (b) 1 only
  • (c) 2 and 3
  • (d) 2 only

Q11. Which one of the following substances has the greatest ionic character?

  • (a) Cl2O
  • (b) NCl3
  • (c) PbCl2
  • (d) BaCl2

Question paper preview

Scanned pages 1–2 for reference. Download the official PDF for the full paper.

Page 1
UPSC Combined Geo-Scientist (Preliminary) Examination 2021 Paper-II Chemistry question paper page 1 scan PDF download, showing exam title and first objective questions.
Page 2
UPSC Combined Geo-Scientist (Preliminary) Examination 2021 Paper-II Chemistry question paper page 1 scan PDF download, showing exam title and first objective questions.

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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 from?

This question paper is from the year 2021.

Which paper is this?

This is Paper-II, which covers Chemistry.

Who conducts the Combined Geo-Scientist Examination?

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

What is the question type for this paper?

The question type for this paper is objective.

What subject does Paper-II cover?

Paper-II covers Chemistry.

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