CBSE Class 12 Chemistry (Theory) Board Question Paper 2018 Set 1
This is the CBSE Class 12 Chemistry (Theory) Previous Year Question Paper from the 2018 Main Exams, Set 1. The paper is for the Hindi medium and has a total of 26 questions spread across 15 printed pages. It is divided into sections with varying marks: questions 1-5 are very short answer type carrying 1 mark each, questions 6-10 are short answer type carrying 2 marks each, questions 11-22 are also short answer type carrying 3 marks each, question 23 is a value-based question worth 4 marks, and questions 24-26 are long answer type carrying 5 marks each. Candidates are allowed 3 hours to complete the exam, with an additional 15 minutes for reading the paper. Calculators are not permitted, but log tables can be used if necessary. Solving this previous year paper will help students understand the exam pattern and improve their performance.
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 contains 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
- Non-stoichiometric composition
- Catalysis
Important topics
- Non-stoichiometric composition of FeO
- Catalytic activity
PDF preview
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Question paper text
SET-1
Series SGN
Roll No.
कोड नं.
Code No.
रोल नं. परीक्षार्थी कोड को उत्तर-पुस्तिका के मुख-पृष्ठ
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 15 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 15 printed pages.
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.
Please write down the Serial Number of the question before attempting it.
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 : 3 घण्टे
Maximum Marks: 70
Time allowed: 3 hours
अधिकतम अंक : 70
P.T.O.
56/1
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 है ।
General Instructions:
- 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 carries 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.
- <math>{\rm FeO}</math> का विश्लेषण दर्शाता है कि इसका <math>{\rm Fe}_{0.95}{\rm O}</math> सूत्र सहित नॉन-स्टॉइकियोमीट्री संघटन होता है । कारण दीजिए ।
1 Analysis shows that FeO has a non-stoichiometric composition with formula <math>Fe_{0.95}O</math>. Give reason.
- CO(g) और <math>H_2(g)</math> भिन्न उत्प्रेरकों की उपस्थिति में अभिक्रिया करके भिन्न-भिन्न उत्पाद देते
हैं । इन अभिक्रियाओं द्वारा उत्प्रेरक की कौन-सी क्षमता प्रदर्शित होती है ? 1
CO (g) and H<sub>2</sub> (g) react to give different products in the presence of different catalysts. Which ability of the catalyst is shown by these reactions? 2 56/1
Frequently asked questions
What is this document?
This is the CBSE Class 12 Chemistry (Theory) Previous Year Board Question Paper from the 2018 Main Exams, Set 1.
What is the total marks and duration for the exam?
The Chemistry exam is for a maximum of 70 marks and the allowed time is 3 hours, with an additional 15 minutes for reading the paper.
How are the questions structured in the paper?
The paper includes very short answer questions (1 mark), short answer questions (2 and 3 marks), a value-based question (4 marks), and long answer questions (5 marks).
Can I use a calculator during the exam?
No, the use of calculators is not allowed. However, you may use log tables if necessary.
How does solving previous year papers help?
Solving previous year question papers helps students understand the board exam pattern, identify important topics, and improve their time management and scoring potential.
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