CBSE Class 10 Science Boards 2020 Question Paper Set 02 Solved

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Class 10 Science Solved Question Papers: CBSE Class 10 Science Boards 2020 Question Paper Set 02 Solved

Access comprehensive previous year question papers for Class 10 Science using the CBSE Class 10 Science Boards 2020 Question Paper Set 02 Solved. Designed to align with the 2026-27 CBSE academic guidelines, these solved papers help students assess their exam readiness and understand official marking schemes.

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Access the complete question paper PDF for Class 10 Science below. Regular practice with these targeted exam papers builds familiarity with standard question patterns and helps secure higher marks in final evaluations.

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.

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Where can I download the official PDF for CBSE Class 10 Science Boards 2020 Question Paper Set 02 Solved?

The CBSE Class 10 Science Boards 2020 Question Paper Set 02 Solved 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 Set 02 Solved based on the official CBSE marking scheme?

Yes, the solutions for CBSE Class 10 Science Boards 2020 Question Paper Set 02 Solved 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 Set 02 Solved help in preparing for the 2026 exams?

Solving previous year papers like CBSE Class 10 Science Boards 2020 Question Paper Set 02 Solved 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 Set 02 Solved in different languages?

Yes, where applicable, CBSE Class 10 Science Boards 2020 Question Paper Set 02 Solved is available in both English and Hindi mediums. All students from Class 10 can access Science study material in their preferred language.

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No, all previous year question papers on StudiesToday, including CBSE Class 10 Science Boards 2020 Question Paper Set 02 Solved, are provided free of charge in mobile-friendly PDF.