CBSE Class 10 Science Question Paper 2020 Set 01 Solved

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Class 10 Science Solved Question Papers: CBSE Class 10 Science Question Paper 2020 Set 01 Solved

Access comprehensive previous year question papers for Class 10 Science using the CBSE Class 10 Science Question Paper 2020 Set 01 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. Wing of a bird and wing of a bat are examples of analogous organ. Justify the answer giving a suitable reason.
 
2. All information for our environment is detected by specialized tips of some nerve cells. Mention the name given to such tips and mention where they are located.
 
SECTION B
 
3. A white colored powder is used by doctors for supporting fractured bones.
 
a) Write chemical name and formula of the powder.
 
b) On mixing this powder with water, a hard solid mass is obtained.
 
Write balanced chemical equation for the change.
 
4. Write any two methods to improve the efficiency of a solar cooker.
                          OR
State any two limitations and two advantages of hydro energy.
 
5. a) What name is given to the sequence of gradual changes over millions of years in which new species are formed.
 
b) Name two human traits which show variation.

SECTION C

6. How ocean thermal energy is harnessed? Write one limitation and one advantage of ocean thermal energy.
 
7. Explain the role of fuse in series with any electrical appliance in an electric circuit. Why should a fuse with defined rating for an electric circuit not be replaced by one with a larger rating?
 
8. A 4.5 cm needle is placed 12 cm away from a convex mirror of focal length 15 cm. Give the location of the image and magnification.
                     OR
An object of height 5 cm is placed perpendicular to the principal axis of a concave lens of focal length 10 cm. If the distance of the object from the optical centre of the lens is 20 cm, determine the position, nature and size of the image.
 
9. Draw a ray diagram to show the position and nature of the image formed when the object is placed between the pole P and focus F of a concave mirror. Write the nature, and size of the image.
 
10. a) Based on electronic configuration, how will you identify the first and the last element of a period.
 
b) “Hydrogen occupies a unique position in modern periodic table. „‟Justify the statement.
 
c) Give two reasons for the late discovery of noble gases.
 
11. a) Why does aqueous solution of acid conduct electricity?
 
b) Hydrochloric acid is a strong acid and ammonium hydroxide is a weak base. Explain.
 
c) During chlor-alkali process, where are chlorine, Hydrogen and sodium hydroxide produced?
                                       OR
a) Why does tooth decay start when pH of the mouth falls below 5.5?
 
b) What is meant by “water of crystallization”? How would you show that blue color copper sulfate crystals contain water of crystallization?
 
12. a) Show the formation of Na2O by transfer of electrons.
 
b) What are amphoteric oxides? Give an example.
 
c) Why is the melting point of NaCl high?
 
13. Explain how water and minerals are transported in plants?
                                    OR
What is translocation? How does it take place in plants?
 
14. The genotype of a green stemmed tomato plant is denoted by “GG” and that of a purple stemmed tomato plant as “gg”. When these two plants are crossed,
 
a) what colour of stem would you expect in their F1 progeny.
 
b) give the percentage of purple stemmed plant if F1 plants are self- pollinated.
 
c) in what ratio would you find the green and purple colour in the F2 progeny.
 
15. A gland secrets a particular hormone. The deficiency of this hormone in the body causes a particular disease in which blood sugar level rises.
 
a) Name the gland and the hormone secreted by it.
 
b) Mention the role played by this hormone.
 
c) Name the disease caused due to the deficiency of this hormone.


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Where can I download the official PDF for CBSE Class 10 Science Question Paper 2020 Set 01 Solved?

The CBSE Class 10 Science Question Paper 2020 Set 01 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 Question Paper 2020 Set 01 Solved based on the official CBSE marking scheme?

Yes, the solutions for CBSE Class 10 Science Question Paper 2020 Set 01 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 Question Paper 2020 Set 01 Solved help in preparing for the 2026 exams?

Solving previous year papers like CBSE Class 10 Science Question Paper 2020 Set 01 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 Question Paper 2020 Set 01 Solved in different languages?

Yes, where applicable, CBSE Class 10 Science Question Paper 2020 Set 01 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 Question Paper 2020 Set 01 Solved, are provided free of charge in mobile-friendly PDF.