UPSC Civil Services Main 2023 Chemistry Paper-I PDF

Central Government Jobs Administrative / Civil Services 2023

  • Year 2023
  • Conducted By UPSC
  • Questions 8
  • Maximum Marks 250
  • Duration Three Hours
  • Languages Hindi & English

Exam Details

Detail Information
Examination Civil Services (Main) Examination
Year 2023
Conducting Body UPSC
Paper Chemistry (Paper-I)
Subject Chemistry
Duration Three Hours
Maximum Marks 250
Number of Questions 8
Question Type Descriptive / Subjective

This is the official question paper for the Civil Services (Main) Examination, 2023, Paper-I for Chemistry. Conducted by UPSC, this paper carries a maximum of 250 marks and is allocated a time duration of three hours. It consists of eight descriptive questions divided into two sections, with candidates required to answer five questions in total, including compulsory questions 1 and 5. This paper is crucial for aspirants aiming for administrative roles in the Indian government, providing a clear understanding of the expected knowledge and analytical skills in Chemistry.

Major Topics Covered

  • Chemistry
  • Physical Constants
  • Conversion Factors

Why This Paper is Important

  • Useful for CIVIL SERVICES (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

  • UPSC Civil Services (Main) Examination 2023 - General Studies Paper-I
  • UPSC Civil Services (Main) Examination 2023 - General Studies Paper-II
  • UPSC Civil Services (Main) Examination 2023 - Chemistry Paper-II
  • UPSC Civil Services Main 2023 Chemistry Paper-I Answer Key
  • UPSC Civil Services Main Chemistry Syllabus
  • UPSC Main Exam Syllabus
  • UPSC Civil Services Main Exam Pattern
  • UPSC Main Exam Pattern Chemistry

Instructions

  • इसमें आठ प्रश्न हैं जो दो खण्डों में विभाजित हैं तथा हिन्दी और अंग्रेजी दोनों में छपे हुए हैं।
  • परीक्षार्थी को कुल पाँच प्रश्नों के उत्तर देने हैं।
  • प्रश्न संख्या 1 और 5 अनिवार्य हैं तथा बाकी प्रश्नों में से प्रत्येक खण्ड से कम-से-कम एक प्रश्न चुनकर तीन प्रश्नों के उत्तर दीजिए।
  • प्रत्येक प्रश्न/भाग के लिए नियत अंक उसके सामने दिए गए हैं।
  • प्रश्नों के उत्तर उसी प्राधिकृत माध्यम में लिखे जाने चाहिए, जिसका उल्लेख आपके प्रवेश-पत्र में किया गया है, और इस माध्यम का स्पष्ट उल्लेख प्रश्न-सह-उत्तर (क्यू० सी० ए०) पुस्तिका के मुखपृष्ठ पर निर्दिष्ट स्थान पर किया जाना चाहिए।
  • प्राधिकृत माध्यम के अतिरिक्त अन्य किसी माध्यम में लिखे गए उत्तर पर कोई अंक नहीं मिलेंगे।
  • जहाँ आवश्यक हो, निर्देशांक आरेखों को प्रश्न का उत्तर देने के लिए दिए गए स्थान में ही बनाना है।
  • जब तक उल्लिखित न हो, संकेत तथा शब्दावली प्रचलित मानक अर्थों में प्रयुक्त हैं।
  • यदि आवश्यक हो, तो उपयुक्त आँकड़ों का चयन कीजिए तथा उनको निर्दिष्ट कीजिए।
  • प्रश्नों के प्रयासों की गणना क्रमानुसार की जाएगी।
  • आंशिक रूप से दिए गए प्रश्नों के उत्तर को भी मान्यता दी जाएगी यदि उसे काटा न गया हो।
  • प्रश्न-सह-उत्तर पुस्तिका में खाली छोड़े गए कोई पृष्ठ अथवा पृष्ठ के भाग को पूर्णतः काट दीजिए।

  • There are EIGHT questions divided in two Sections and printed both in HINDI and in ENGLISH.
  • Candidate has to attempt FIVE questions in all.
  • Question Nos. 1 and 5 are compulsory and out of the remaining, THREE are to be attempted choosing at least ONE question from each Section.
  • The number of marks carried by a question/part is indicated against it.
  • Answers must be written in the medium authorized in the Admission Certificate which must be stated clearly on the cover of this Question-cum-Answer (QCA) Booklet in the space provided.
  • No marks will be given for answers written in a medium other than the authorized one.
  • Coordinate diagrams, wherever required, 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 considered necessary, and indicate the same clearly.
  • 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.

Questions (page 2)

Q0. Some useful fundamental constants and conversion factors
कुछ उपयोगी मौलिक स्थिरांक और रूपांतरण कारक

(1) NA = 6.022 × 1023 \text mol-1

(2) Rydberg constant = 2.178 × 10-18 \text J

(3) c = 2.998 × 108 \text m s-1

(4) kB = 1.38 × 10-23 \text J K-1

(5) e = 1.602 × 10-19 \text C

(6) me = 9.109 × 10-31 \text kg

(7) F = 96485 \text C mol-1

(8) R = 8.314 \text J K-1 \text mol-1 = 0.082 \text L atm K-1 \text mol-1

(9) h = 6.626 × 10-34 \text J s

(10) π = 3.142

(11) 1 amu = 1.66 × 10-27 \text kg

(12) 1 cal = 4.184 \text J

(13) 1 J = 1 \text kg m2 \texts-2

(14) 1 \text Å = 10-8 \text cm = 10-10 \text m = 0.1 \text nm = 100 \text pm

(15) 1 atm = 760 \text torr = 1.01325 × 105 \text Pa

(16) 1 bar = 1 × 105 \text Pa = 0.9869 \text atm

(17) 1 \text eV = 1.602 × 10-19 \text J

(18) 1 L atm = 101.34 \text J

(19) 1 eV/atom = 23060 \text cal mol-1

(20) 1 Pa = 1 \text kg m-1 \text s-2

(21) 1 \text V = 1 \text J C-1

(22) Acceleration of free fall, g = 9.81 \text m s-2

(23) 1 torr = 133.322 \text N m-2

(24) 1 \text N = 1 \text kg m s-2

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Frequently asked questions

What is the name of the examination?

The examination is the Civil Services (Main) Examination, 2023.

Which paper is this question paper for?

This is for Chemistry Paper-I.

Who conducts the Civil Services Examination?

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

What is the maximum number of marks for Chemistry Paper-I?

The maximum marks for Chemistry Paper-I is 250.

What is the time allowed for Chemistry Paper-I?

The time allowed for Chemistry Paper-I is Three Hours.

How many questions are there in Chemistry Paper-I?

There are eight questions in total, divided into two sections.

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