CBSE Class 10 Science Question Paper Solved 2020 Set A

Read and download CBSE Class 10 Science Question Paper Solved 2020 Set A designed as per the latest question paper pattern and Class 10 examination guidelines issued by CBSE, NCERT and KVS. The past year Question Papers for Class 10 Science have been provided with solutions which will help students to assess their performance and find out topics in Science Class 10 which they need to improve to get better marks in Class 10 exams. After solving these last year papers also refer to solved Sample Papers for Class 10 Science available on our website to build strong understanding of the subject

Science Question Paper Class 10

Students can refer to the below Class 10 Science Question Paper designed to help students understand the pattern of questions that will be asked in Class 10 exams. Please download CBSE Class 10 Science Question Paper Solved 2020 Set A

Science Class 10 Question Paper

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.


Please click on below link to download CBSE Class 10 Science Question Paper Solved 2020 Set A

2012
CBSE Class 10 Science Question Paper 2012 (1)
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 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 SA 2 2012 (1)
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 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 SA1 2012
CBSE Class 10 Science Question Paper SA2 2012 (1)

CBSE Class 10 Science Question Paper Solved 2020 Set A

We hope you liked the above provided CBSE Class 10 Science Question Paper Solved 2020 Set A. To get an understanding of the type of questions which were asked in previous year exams, it is important for Class 10 students to refer to CBSE Class 10 Science Question Paper Solved 2020 Set A that we have provided above. Students can download all the Question Papers for Class 10 Science which were issued in the exams so that you can practise them and solve all types of questions which have been asked till now. By doing all CBSE Class 10 Science Question Paper Solved 2020 Set A PYP (previous year papers) you will understand the regular questions and MCQ questions for Class 10 Science which are always asked and learn them so that you can get full marks in those questions. You can download CBSE Class 10 Science Previous Year Question Papers and Class 10 Science Sample Papers in PDF. You should attempt all the last year question paper for Class 10 and Class 10 Science MCQ Test in examination conditions at home and then compare their answers with the solutions provided by our teachers.
 

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