CBSE Class 10 Science Question Paper Solved 2021 Set B

Access and download CBSE Class 10 Science Question Paper Solved 2021 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 Question Paper Solved 2021 Set B to begin your self-assessment today.

Science Class 10 Question Paper PDF with Solutions

SECTION A
 
1 Which is the cell organelle present in guard cell is absent in epidermal cell? 
 
2 Why regeneration is not considered as same as reproduction in most organisms? 
 
3 Two elements X and Y have electronic configuration 2,8,1 and 2,8,7 respectively. Name the family to which X and Y belong and write the formula of the compound formed between them.
 
4 Write any two advantages and any two limitations of harnessing wind energy on a large scale. 
 
5 An electric iron has a rating of 750 W ,220 V. Calculate the
 
(i) current flowing through it.
 
(ii) Its resistance when in use.
 
6 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 lens is 20 cm, determine the position and magnification of the image.
 
7 (i) What are the values of (a) far point and (b) near point of vision for a normal adult person?
 
(ii) A student has difficulty in reading the black board while sitting at the back seats. What could be this defect of vision?
 
(iii) Draw a ray diagram to illustrate this defect.
 
8 Copper electrode is used in the refining of copper from copper nitrate solution.
 
a) Name the process and the impurities obtained.
 
b) Can silver electrode be used in the refining of copper from copper nitrate solution. Justify your answer.
 
9 a) State Mendeleev‟s Periodic law.
 
b) What were the two criteria used by Mendeleev in making the periodic table?
 
c) Why there‟s no mention of noble gases in Mendeleev‟s Periodic table?
 
10 Give reason for the following: (i) Glottis is covered by epiglottis, (ii) Lung alveoli are covered with blood capillaries, (iii) The wall of trachea is supported by cartilage rings.
                                        OR
List three differences between arteries and veins.
 
11 (a) Name the part of brain which controls (i) voluntary action, (ii) involuntary action.
 
(b) What is the significance of the peripheral nervous system? Name the components of this nervous system and distinguish between the origins of the two.
 
12 Name the device that converts mechanical energy into electrical energy. Draw the labelled diagram and write the principle of working of this device.
                                       OR
i) What is the function of earth wire in domestic electrical circuits?
 
ii) Explain what is short circuiting an electric supply.
 
iii) What is the usual current rating of the fuse wire in the line to feed (a) Lights and fans? (b) Appliances of 2kW or more power?
 
13 a) The pH of the solutions A,B&C are 7, 2,6.5 respectively. Arrange them in the increasing order of the H+ ion concentration.
 
b) How do chocolate and sweets effect the pH in our mouth and what is the role of the toothpaste in preventing tooth decay?
                                       OR
a) What is water of crystallization?
 
b) „The water of crystallization gives the salt crystals its colour‟. Explain with an example.
 
14 All the human races like Africans, Asians, Europeans, Americans and others might have evolved from a common ancestor. Provide a few evidences in support of this view.
 

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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 2021 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 Question Paper Solved 2021 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 Question Paper Solved 2021 Set B

Regularly practicing CBSE Class 10 Science Question Paper Solved 2021 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 Question Paper Solved 2021 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.

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