CBSE Class 10 Science Boards 2020 Question Paper Solved Set B

Access and download CBSE Class 10 Science Boards 2020 Question Paper Solved Set B, carefully designed as per the latest 2025-26 examination guidelines issued by CBSE, NCERT, and KVS. These Class 10 Science previous year question papers include detailed solutions, helping students to assess their performance and identify and improve key areas before the final exams.

Solved Science Question Papers for Class 10

Practicing these Class 10 Science question papers is the best way to understand the actual exam pattern and marking scheme. By solving these papers under timed conditions, Class 10 students can improve their speed and accuracy. Download the full CBSE Class 10 Science Boards 2020 Question Paper Solved Set B to begin your self-assessment today.

Science Class 10 Question Paper PDF with Solutions

Section – A
1. Covalent compounds have low melting and boiling point. Why ?
 
2. How many metals are present in second period of periodic table ?
 
3. Answer question numbers 3(a) to 3(d) on the basis of your understanding of the following paragraph and the related studied concepts. Geothermal energy is the energy produced by the heat of molten rocks formed in the deeper hot regions of the earth’s crust. This energy is harnessed to generate electricity. When water is made to flow deep underground in the rocks it returns as steam (or hot water, which is later converted to steam) to drive a turbine on an electric power generator.
In India, exploration and study of geothermal fields started in 1970. The Geological Survey in India has identified 350 geothermal energy locations in the country. The most promising of these is in Puga valley of Ladakh. The estimated potential for geothermal energy in India is about 10000 MW. There are seven geothermal provinces in India namely the Himalayas, Sohna, West coast, Cambay, Son-Narmada-Tapi; Godavari and Mahanadi. Most power stations in India produce Alternating Current (A.C).
 
(a) What are geothermal energy hot-spots ? 
 
(b) Name two countries, other than India, where power plants based on geothermal energy are operational.
 
(c) Name the phenomenon that explains the working of an electric generator.
 
(d) State an important advantage of using AC over DC.
 
4. Answer question numbers 4(a) to 4(d) on the basis of your understanding of the following information and related studied concepts.
 
Thyroid gland is a bilobed structure situated in our neck region. It secretes a hormone called thyroxine. Iodine is necessary for the thyroid gland to make thyroxine. Thyroxine regulates carbohydrate, protein and fat metabolism in the body. It promotes growth of body tissues also. When there is an excess of thyroxine in the body, a person suffers from hyperthyroidism and if this gland is underactive it results in hypothyroidism. Hyperthyroidism is diagnosed by blood tests that measure the levels of thyroxine and Thyroid Stimulating Hormone (TSH).
Hypothyroidism is caused due to the deficiency of iodine in our diet resulting in a disease called goitre. Iodised salt can be included in our diet to control it.
 
(a) Where is thyroid gland situated in our body ? 
 
(b) State the function of thyroxine in human body. 
 
(c) What is hyperthyroidism ? 
 
(d) How can we control hypothyroidism ? 
 
5. Consider the following reasons for the reddish appearance of the sun at the sunrise or the sunset :
 
A. Light from the sun near the horizon passes through thinner layers of air.
 
B. Light from the sun covers larger distance of the earth’s atmosphere before reaching our eyes.
 
C. Near the horizon, most of the blue light and shorter wavelengths are scattered away by the particles.
 
D. Light from the sun near the horizon passes through thicker layers of air.
 
The correct reasons are
 
(a) A and C only
 
(b) B, C and D
 
(c) A and B only
 
(d) C and D only
 
Please click on below link to download CBSE Class 10 Science Boards 2020 Question Paper Solved Set B.
2012
CBSE Class 10 Science Question Paper 2012 (1)
CBSE Class 10 Science Question Paper 2012 (10)
CBSE Class 10 Science Question Paper 2012 (11)
CBSE Class 10 Science Question Paper 2012 (12)
CBSE Class 10 Science Question Paper 2012 (13)
CBSE Class 10 Science Question Paper 2012 (14)
CBSE Class 10 Science Question Paper 2012 (15)
CBSE Class 10 Science Question Paper 2012 (16)
CBSE Class 10 Science Question Paper 2012 (2)
CBSE Class 10 Science Question Paper 2012 (3)
CBSE Class 10 Science Question Paper 2012 (4)
CBSE Class 10 Science Question Paper 2012 (5)
CBSE Class 10 Science Question Paper 2012 (6)
CBSE Class 10 Science Question Paper 2012 (7)
CBSE Class 10 Science Question Paper 2012 (8)
CBSE Class 10 Science Question Paper 2012 (9)
CBSE Class 10 Science Question Paper SA 2 2012 (1)
CBSE Class 10 Science Question Paper SA 2 2012 (10)
CBSE Class 10 Science Question Paper SA 2 2012 (11)
CBSE Class 10 Science Question Paper SA 2 2012 (12)
CBSE Class 10 Science Question Paper SA 2 2012 (13)
CBSE Class 10 Science Question Paper SA 2 2012 (14)
CBSE Class 10 Science Question Paper SA 2 2012 (15)
CBSE Class 10 Science Question Paper SA 2 2012 (16)
CBSE Class 10 Science Question Paper SA 2 2012 (17)
CBSE Class 10 Science Question Paper SA 2 2012 (2)
CBSE Class 10 Science Question Paper SA 2 2012 (3)
CBSE Class 10 Science Question Paper SA 2 2012 (4)
CBSE Class 10 Science Question Paper SA 2 2012 (5)
CBSE Class 10 Science Question Paper SA 2 2012 (6)
CBSE Class 10 Science Question Paper SA 2 2012 (7)
CBSE Class 10 Science Question Paper SA 2 2012 (8)
CBSE Class 10 Science Question Paper SA 2 2012 (9)
CBSE Class 10 Science Question Paper SA1 2012
CBSE Class 10 Science Question Paper SA2 2012 (1)

CBSE Class 10 Science Boards 2020 Question Paper Solved Set B

To understand the types of questions asked in past examinations, it is very important for Class 10 students to solve the CBSE Class 10 Science Boards 2020 Question Paper Solved Set B provided above. You can easily download these past papers for Class 10 Science in PDF format for the last 10 years. By practicing these actual exam questions you will gain an understanding of the difficulty level and the variety of topics covered over the years. By solving these Previous Year Papers (PYPs) you will understand both descriptive and MCQ questions in your final tests.

Importance of solving CBSE Class 10 Science Boards 2020 Question Paper Solved Set B

Regularly practicing CBSE Class 10 Science Boards 2020 Question Paper Solved Set B is the best way to improve your score in Class 10 Science. These papers will give you details of the marking scheme and the paper structure used by the CBSE. By regularly attempting these under actual exam conditions at home, you can slowly improve your time management skills, which will help you to complete your Science paper within the allowed duration.

Benefits of downloading CBSE Class 10 Question Papers

Having the CBSE Class 10 Science Boards 2020 Question Paper Solved Set B in PDF format allows you to revise key concepts anywhere, even without an internet connection. These sets are a reliable tool to practice numerical problems and understand the correct approach to all types of answers. After solving the questions, you should compare your work with the solutions provided by our teachers. Along with these papers, students should always solve the Class 10 Science Sample Papers and MCQ tests on studiestoday.com for a complete revision.

Where can I download the official PDF for CBSE Class 10 Science Boards 2020 Question Paper Solved Set B?

The CBSE Class 10 Science Boards 2020 Question Paper Solved Set B is available for download on StudiesToday.com. It includes complete set with all sections so that Class 10 students can practice with the exact same paper that came in the CBSE exams.

Are the solutions for CBSE Class 10 Science Boards 2020 Question Paper Solved Set B based on the official CBSE marking scheme?

Yes, the solutions for CBSE Class 10 Science Boards 2020 Question Paper Solved Set B are prepared by subject matter experts as per official marking scheme. Class 10 students will understand the structure of answers and 'step-marks' methodology Science.

How does solving CBSE Class 10 Science Boards 2020 Question Paper Solved Set B help in preparing for the 2026 exams?

Solving previous year papers like CBSE Class 10 Science Boards 2020 Question Paper Solved Set B is important to understand repeat themes and question difficulty levels of Science. It helps Class 10 students to test their time management skills too.

Can I access CBSE Class 10 Science Boards 2020 Question Paper Solved Set B in different languages?

Yes, where applicable, CBSE Class 10 Science Boards 2020 Question Paper Solved Set B is available in both English and Hindi mediums. All students from Class 10 can access Science study material in their preferred language.

Is there a charge to download the CBSE Class 10 Science solved papers?

No, all previous year question papers on StudiesToday, including CBSE Class 10 Science Boards 2020 Question Paper Solved Set B, are provided free of charge in mobile-friendly PDF.