CBSE Class 10 Science 2019 Previous Year Board Question Paper (Delhi Set-1)
This is the CBSE Class 10 Science 2019 Main Exam Delhi Set-1 Previous Year Question Paper. The paper is divided into five sections: A, B, C, D, and E, with all questions being compulsory. Section A contains one-mark questions, Section B has two-mark questions, Section C includes three-mark questions, Section D features five-mark questions, and Section E consists of two-mark questions based on practical skills. Internal choices are provided in Sections B, C, D, and E. Solving this board question paper helps students understand the exam pattern, question types, and marking scheme, crucial for effective preparation and scoring well in the upcoming board examinations.
Quick info
| Board | CBSE |
|---|---|
| Class | 10 |
| Subject | Science |
| Session | 2019 |
| Language | English |
| Type | Previous Year Question Paper |
| Exam type | Board Exam |
Paper pattern
The question paper comprises five sections (A, B, C, D, E). Section A has 1-mark questions, Section B has 2-mark questions, Section C has 3-mark questions, Section D has 5-mark questions, and Section E has 2-mark practical skills questions. Internal choices are available in Sections B, C, D, and E.
Topics covered
Paper topics
- Galvanometer function
- Biogas as fuel
- Modern Periodic Table
- Electronic configuration
- Group and Period
- Silicon properties
- Practical skills
Important topics
- Modern Periodic Table structure
- Electronic configuration and periodic table placement
- Practical skills assessment
PDF preview
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Question paper text
Class X (CBSE 2019) Science Delhi (Set-1)
General Instructions:
- The question paper comprises five sections, A, B, C, D and E. You are to attempt all the sections.
- All questions are compulsory.
- Internal choice is given in sections B, C, D and E.
- Question numbers 1 and 2 in Section A are one mark questions. They are to be answered in one word or in one sentence.
- Question numbers 3 to 5 in Section B are two-marks questions. These are to be answered in about 30 words each.
- Question numbers 6 to 15 in Section C are three-marks questions. These are to be answered in about 50 words each.
- Question numbers 16 to 21 in Section D are five-marks questions. These are to be answered in about 70 words each.
- Question numbers 22 to 27 in Section E are based on practical skills. Each question is a two marks question. These are to be answered in brief.
Question 1
What is the function of a galvanometer in a circuit?
SOLUTION:
The function of the galvanometer in the circuit is to detect or measure the small amount of current flowing in the circuit.
Question 2
Why is biogas considered an excellent fuel?
SOLUTION:
Biogas is considered an excellent fuel because of the following reasons:
- Biogas does not cause air pollution.
- Biogas produces a large amount of heat per unit mass.
Question 3
How it can be proved that the basic structure of the Modern Periodic Table is based on the electronic configuration of atoms of different elements?
OR
The electronic configuration of an element is 2, 8, 4. State its:
- group and period in the Modern Periodic Table.
(b) name and write its one physical property.
SOLUTION:
Modern periodic law states that the physical and chemical properties of an element in the periodic table are the periodic function of the atomic number of that element. Electronic configuration of the elements plays an important role in the placement of elements in the modern periodic table. The valence shell electron of an element decides its position in a particular group or period.
For example, if the electronic configuration of an element is 2, 1, it means that the element belongs to group I and 2nd period (valence electron is present in the 2nd shell). Similarly, if the electronic configuration of an element is 2, 8, 1, it means that the element belongs to group I and 3rd period (valence electron is present in the 3rd shell).
Thus, the modern periodic table is based on the electronic configuration of the different elements.
OR
- The electronic configuration of the given element is 2,8,4. Since, the number of
valence electrons for the given element is 4. Hence, the element belongs to group 14 <math>(10++4)</math> and the 3rd period.
(b) The atomic number of the given element is 14. Hence, the given element is Silicon. Silicon is a metalloid.
Question 4
Frequently asked questions
What is this document?
This is the CBSE Class 10 Science Previous Year Board Question Paper from the 2019 Main Exam, Delhi Set-1.
What is the structure of the question paper?
The paper has five sections (A, B, C, D, E) with varying marks per question and internal choices in sections B, C, D, and E.
How can solving this paper help students?
Solving this previous year question paper helps students understand the exam pattern, difficulty level, and marking scheme, improving their preparation and confidence.
What types of questions are included?
The paper includes questions on concepts like the function of a galvanometer, biogas, the Modern Periodic Table, electronic configurations, and practical skills.
Is this paper useful for the upcoming board exams?
Yes, practicing with this 2019 CBSE Class 10 Science board question paper is highly recommended for effective exam preparation and scoring well.
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