CBSE Class 12 Chemistry 2018 Compartment Exam Previous Year Question Paper Set 1
This is the CBSE Class 12 Chemistry (Theory) Previous Year Question Paper from the 2018 Compartment Exams, Set 1. The paper is for the Hindi medium and has a total of 70 maximum marks, with a duration of 3 hours. It contains 26 questions divided into different categories: very short-answer questions (1 mark each) from Q1-5, short-answer questions (2 marks each) from Q6-10, short-answer questions (3 marks each) from Q11-22, a value-based question (4 marks) as Q23, and long-answer questions (5 marks each) from Q24-26. Candidates are allowed 15 minutes to read the paper. Solving this previous year's question paper is crucial for students to understand the exam pattern, question types, and marking scheme, thereby enhancing their preparation and performance in the board examinations.
Quick info
| Board | CBSE |
|---|---|
| Class | 12 |
| Subject | Chemistry |
| Session | 2018 |
| Language | Hindi |
| Type | Previous Year Question Paper |
| Exam type | Board Exam |
Paper pattern
The paper consists of 26 questions divided into very short-answer (1 mark), short-answer (2 and 3 marks), value-based (4 marks), and long-answer (5 marks) types. The total marks are 70, and the allowed time is 3 hours.
Topics covered
Paper topics
- Chemical Kinetics
- Adsorption
- Coordination Compounds
- Organic Chemistry
- Reaction Mechanisms
Important topics
- Reaction Order
- Adsorption Exothermicity
- Coordination Isomerism
- Aromatic Compound Identification
- SN2/E2 Reactions
PDF preview
Read page by page below. PDF is streamed from the official NCERT website — no download button on this page.
Question paper text
SET - 1
Series : SGN/C
कोड नं.
Code No. 56/1
रोल नं.
Roll No.
परीक्षार्थी कोड को उत्तर-पुस्तिका के मुख-पृष्ट
पर अवश्य लिखें ।
Candidates must write the Code on
the title page of the answer-book.
कृपया जाँच कर लें कि इस प्रश्न-पत्र में मुद्रित पृष्ठ 12 हैं।
प्रश्न-पत्र में दाहिने हाथ की ओर दिए गए कोड नम्बर को छात्र उत्तर-पुस्तिका के मुख-पृष्ठ पर लिखें।
कृपया जाँच कर लें कि इस प्रश्न-पत्र में 26 प्रश्न हैं।
कृपया प्रश्न का उत्तर लिखना शुरू करने से पहले, प्रश्न का क्रमांक अवश्य लिखें।
इस प्रश्न-पत्र को पढ़ने के लिए 15 मिनट का समय दिया गया है। प्रश्न-पत्र का वितरण पूर्वाह्न में 10.15 बजे किया जाएगा । 10.15 बजे से 10.30 बजे तक छात्र केवल प्रश्न-पत्र को पढ़ेंगे और इस अवधि के दौरान वे उत्तर-पुस्तिका पर कोई उत्तर नहीं लिखेंगे।
- Please check that this question paper contains 12 printed pages.
<math>\bullet</math> Code number given on the right hand side of the question paper should be written on the title page of the answer-book by the candidate.
Please check that this question paper contains 26 questions.
<math>\blacktriangle</math> Please write down the Serial Number of the question before attempting it.
<math>\bullet</math> 15 minute time has been allotted to read this question paper. The question paper will be distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the students will read the question paper only and will not write any answer on the answer-book during this period.
रसायन विज्ञान (सैद्धान्तिक)
CHEMISTRY (Theory)
निर्धारित समय : ३ घण्टे
अधिकतम अंक : 70
Time allowed : 3 hours
Maximum Marks: 70
सामान्य निर्देश :
(i) सभी प्रश्न अनिवार्य हैं।
- प्रश्न-संख्या 1 से 5 तक अति लघु-उत्तरीय प्रश्न हैं और प्रत्येक प्रश्न के लिए 1 अंक है।
- प्रश्न-संख्या 6 से 10 तक लघु-उत्तरीय प्रश्न हैं और प्रत्येक प्रश्न के लिए 2 अंक हैं।
- प्रश्न-संख्या 11 से 22 तक भी लघु-उत्तरीय प्रश्न हैं और प्रत्येक प्रश्न के लिए 3 अंक हैं।
- प्रश्न-संख्या 23 मूल्याधारित प्रश्न है और इसके लिए 4 अंक हैं।
- प्रश्न-संख्या 24 से 26 तक दीर्घ-उत्तरीय प्रश्न हैं और प्रत्येक प्रश्न के लिए 5 अंक हैं।
- यदि आवश्यकता हो, तो लॉग टेबलों का प्रयोग करें। कैल्कुलेटरों के उपयोग की अनुमति नहीं हैं।
C/1 56/1 1
General Instructions:
(i) All questions are compulsory.
- Questions number 1 to 5 are very short-answer questions and carry 1 mark each.
- Questions number 6 to 10 are short-answer questions and carry 2 marks each.
- Questions number 11 to 22 are also short-answer questions and carry 3 marks each.
- Question number 23 is a value based question and carry 4 marks.
- Questions number 24 to 26 are long-answer questions and carry 5 marks each.
- Use log tables, if necessary. Use of calculators is not allowed.
- अभिक्रिया <math>A \to B</math> के लिए, जब A की सान्द्रता नौ गुनी बढ़ाई जाती है तो अभिक्रिया वेग तीन गुना हो जाता है। अभिक्रिया की कोटि क्या है?
1 For the reaction <math>A \rightarrow B</math>, the rate of reaction becomes three times when the concentration of A is increased by nine times. What is the order of reaction?
- अधिशोषण हमेशा ऊष्माक्षेपी क्यों होता है ? 1
Why is adsorption always exothermic?
- <math>[\mathrm{Cu}(\mathrm{NH_3})_4][\mathrm{PtC}l_4]</math> का उपसहसंयोजन समावयव लिखिए ।
1 Write the coordination isomer of <math>[Cu(NH_3)_4][PtCl_4]</math>.
- एक ऐरोमेटिक कार्बनिक यौगिक ‘A’ जिसका अणुसूत्र <math>C_8H_8O</math> है धनात्मक DNP और आयडोफॉर्म परीक्षण देता है। यह टॉलेन अभिकर्मक को अपचयित नहीं करता है और ब्रोमीन जल को भी रंगहीन नहीं करता है। ‘A’ की संरचना लिखिए।
1 An aromatic organic compound 'A' with molecular formula C<sub>8</sub>H<sub>8</sub>O gives positive DNP and iodoform tests. It neither reduces Tollens' reagent nor does it decolourise bromine water. Write the structure of 'A'.
- सोडियम एथॉक्साइड की तृतीयक ब्यूटिल क्लोराइड से अभिक्रिया होने पर प्राप्त मुख्य उत्पाद की प्रागुक्ति कीजिए।
1 Predict the major product formed when sodium ethoxide reacts with tert.Butyl chloride. 2 56/1 C/1
Frequently asked questions
What is this document?
This is the CBSE Class 12 Chemistry (Theory) Previous Year Question Paper from the 2018 Compartment Exams, Set 1, for Hindi medium students.
What is the total mark distribution and time duration?
The question paper has a maximum of 70 marks and is to be completed in 3 hours.
How are the questions structured in this paper?
The paper includes very short-answer (1 mark), short-answer (2 and 3 marks), a value-based question (4 marks), and long-answer (5 marks) questions.
Why is solving previous year papers important for CBSE Class 12 Chemistry?
Solving previous year question papers helps students understand the board pattern, question difficulty, and marking scheme, improving their exam preparation and confidence.
What is the benefit of practicing with the 2018 Compartment Exam paper?
Practicing with this specific paper allows students to familiarize themselves with the types of questions asked in compartment exams and assess their readiness.
Content reviewed by the NCERT Help team. Editorial Team and update policy
Question Papers PDF on NCERT Help. URL unchanged for search indexing.