IFoS Chemistry Paper II 2021 - ZCVB-B-CHM

Central Government Jobs Other Jobs 2021

  • Year 2021
  • Conducted By Union Public Service Commission (UPSC)
  • Maximum Marks 200
  • Duration Three Hours Maximum Marks: 200
  • Languages English

Exam Details

Detail Information
Examination Indian Forest Service (Main) Examination
Year 2021
Conducting Body Union Public Service Commission (UPSC)
Paper Paper - II
Subject Chemistry
Duration Three Hours Maximum Marks: 200
Maximum Marks 200

This JSON aggregates the PAGE 1 and PAGE 2 OCR data for the Indian Forest Service (Main) Examination 2021, Chemistry Paper II (Code ZCVB-B-CHM). Page 1 supplies the exam header, code, timing, marks, and overall instructions. Page 2 presents Section A with Q1 and its subparts, including aromaticity classification, reaction mechanisms, and a rubber IR identification question. The repair emphasizes correct line breaks, preserves numbering, and separates sub-parts. The SEO metadata captures the exam's structure: eight questions, five to attempt, compulsory Q1 and Q5, English-language answers, and a two-section scheme. The combined data supports SEO-focused metadata, with a detailed FAQ, topics, keywords, and image metadata to improve discoverability of this IFS Chemistry paper.

Major Topics Covered

  • Indian Forest Service (IFoS) Exam
  • Chemistry Paper II
  • Aromaticity
  • Antiaromaticity
  • Non-aromaticity
  • Reaction mechanisms
  • FMO (Frontier Molecular Orbital) theory
  • Hydrogen migration
  • Organic reaction sequences
  • Natural rubber monomer
  • IR spectroscopy
  • Organic synthesis
  • LDA reactions
  • Ethene and rubber identification

Why This Paper is Important

  • Useful for Indian Forest Service (Main) Examination 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

Instructions

  • There are EIGHT questions in all, out of which FIVE are to be attempted.
  • Out of the remaining SIX questions, THREE are to be attempted selecting at least ONE question from each of the two Sections A and B.
  • 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.
  • The number of marks carried by a question/part is indicated against it.
  • Unless otherwise mentioned, symbols and notations have their usual standard meanings.
  • Assume suitable data, if necessary, and indicate the same clearly.
  • Neat sketches may be drawn, wherever required.
  • Answers must be written in ENGLISH only.

Questions (page 2)

Q1. (a) Q1. Assign the following compounds as aromatic, antiaromatic and non-aromatic: Cyclooctatetraene; cyclobutadiene; hν

(a) Q1. Assign the following compounds as aromatic, antiaromatic and non-aromatic: Cyclooctatetraene; cyclobutadiene; hν

(b) (i) Predict the reaction mechanism and configuration of the excited state of the above reaction.
(ii) Using FMO approach, explain the reason for migration of hydrogen.

(c) Complete the following reactions with suitable mechanisms :

(d) Complete the following reaction sequence and give suitable mechanisms for the formation of the major products :

(e) Write the monomer unit of natural rubber. How can natural rubber and polyethene be identified by IR spectroscopy?

  • (a) Q1. Assign the following compounds as aromatic, antiaromatic and non-aromatic: Cyclooctatetraene; cyclobutadiene; hν
  • (b) (i) Predict the reaction mechanism and configuration of the excited state of the above reaction.
  • (c) Complete the following reactions with suitable mechanisms :
  • (d) Complete the following reaction sequence and give suitable mechanisms for the formation of the major products :

Question paper preview

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IFoS Chemistry Paper II 2021 - ZCVB-B-CHM — page 1 instructions scan PDF download
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IFoS Chemistry Paper II 2021 - ZCVB-B-CHM — page 1 instructions scan PDF download

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Frequently asked questions

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Use the Download PDF button on this page to save the official Indian Forest Service (Main) Examination (2021) Paper - II paper hosted on QuizCurrent.

Who conducts the Indian Forest Service (Main) Examination?

The Indian Forest Service (Main) Examination is conducted by Union Public Service Commission (UPSC). This portal reproduces the scanned question paper for practice and revision.

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Refer to the instructions section on page 1 for the total question count and marking scheme.

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