UPSC Civil Services Main 2018 Chemistry Paper II PDF

Central Government Jobs Other Jobs 2018

  • Year 2018
  • Conducted By UPSC
  • Questions 8
  • Maximum Marks 250
  • Duration Three Hours
  • Languages English & Hindi

Exam Details

Detail Information
Examination UPSC Civil Services Main Examination
Year 2018
Conducting Body UPSC
Paper Chemistry Paper - II
Subject Chemistry
Duration Three Hours
Maximum Marks 250
Number of Questions 8
Question Type Mixed

This is the Chemistry Paper II from the UPSC Civil Services Main Examination held in 2018. The paper is divided into two sections and contains a total of eight questions, with candidates required to answer five. Questions 1 and 5 are compulsory, and at least one question must be attempted from each section. The paper is bilingual, available in both Hindi and English, and carries a maximum of 250 marks with a time duration of three hours. This paper is crucial for aspirants aiming to secure a position in the Indian civil services, providing a clear understanding of the depth and breadth of knowledge expected in Chemistry.

Major Topics Covered

  • Molecular Orbital Theory
  • Reaction Mechanisms
  • Acidity
  • Electrophilic Addition

Why This Paper is Important

  • Useful for UPSC 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 2017 Chemistry Paper II
  • UPSC Civil Services Main Examination 2019 Chemistry Paper II
  • UPSC Civil Services Main Examination 2018 Chemistry Paper I
  • UPSC Civil Services Main Examination 2018 Chemistry Paper II Answer Key
  • UPSC Civil Services Main Examination Chemistry Syllabus
  • UPSC Mains Optional Subject Syllabus
  • UPSC Civil Services Main Examination Pattern
  • UPSC Mains Exam Structure

Instructions

  • दो खण्डों में कुल आठ प्रश्न दिए गए हैं जो हिन्दी एवं अंग्रेजी दोनों में छपे हैं।
  • उम्मीदवार 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 अंकित 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 है।
  • यदि आवश्यक हो, तो उपयुक्त आँकड़ों का चयन कीजिए तथा उनको निर्दिष्ट कीजिए।
  • प्रश्नों के प्रयासों की गणना क्रमानुसार की नाएगी।
  • 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.
  • EG7-D-CAM/2 \mathbf{1} the control of the property of the

Questions (page 2)

Section A

Q1.

(a) निम्नलिखित के लिए π-आण्विक कक्षीय ऊर्जा-स्तर आरेख बनाइए :
(i) बेजीन
(ii) साइक्लोब्यूटाडाईन
(iii) साइक्लोपेन्टाडाईनिल ऋणायन

Draw the π-molecular orbital energy level diagram for the following :
(i) Benzene
(ii) Cyclobutadiene
(iii) Cyclopentadienyl anion

(b) NBS सक्सिनिमाइड से कैसे प्राप्त किया जाता है? इसकी प्रोपीन के साथ सूर्य-प्रकाश की उपस्थिति में अभिक्रिया लिखिए। उसकी क्रियाविधि लिखिए।

How is NBS obtained from succinimide? Write its reaction with propene in presence of sunlight. Outline the mechanism.

(c) इस तथ्य का कारण बताइए कि यौगिक A सल्फ्यूरिक अम्ल के लगभग बराबर प्रबल है :
(i) OH
O
OH
A

जब ट्रांस-2-ब्यूटीन CH3COCI के साथ निर्जल AlCl3 की उपस्थिति में अभिक्रिया करता है, तब क्या होता है?

Account for the fact that compound A is almost as strong an acid as H2SO4 :
(i)
OH
O
OH
A

(ii) What happens when trans-2-butene is reacted with CH3COCl in presence of anhydrous AlCl3?

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Frequently asked questions

What is the name of the exam?

The exam is the UPSC Civil Services Main Examination.

What year is this question paper from?

This question paper is from the year 2018.

Who conducts the Civil Services Main Examination?

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

What is the subject of this paper?

This is Chemistry Paper II.

What is the maximum marks for this paper?

The maximum marks for Chemistry Paper II is 250.

What is the time allowed to complete this paper?

The time allowed is Three Hours.

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