CBSE Class 10 Science Question Paper 2021 Set 02 Solved

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Official CBSE Exam Papers for Class 10 Science

Explore authentic exam materials through the CBSE Class 10 Science Question Paper 2021 Set 02 Solved. Tailored for Class 10 learners, utilizing these Science previous year papers ensures thorough preparation and strengthens time management skills before final CBSE evaluations.

Solved Previous Year Papers for Science

View or download the dedicated CBSE Class 10 Science Question Paper 2021 Set 02 Solved resource below. Engaging with these previous year papers under timed conditions ensures continuous academic progress and mastery of the 2026-27 exam format.

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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Where can I download the official PDF for CBSE Class 10 Science Question Paper 2021 Set 02 Solved?

The CBSE Class 10 Science Question Paper 2021 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 Question Paper 2021 Set 02 Solved based on the official CBSE marking scheme?

Yes, the solutions for CBSE Class 10 Science Question Paper 2021 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 Question Paper 2021 Set 02 Solved help in preparing for the 2026
exams?

Solving previous year papers like CBSE Class 10 Science Question Paper 2021 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 Question Paper 2021 Set 02 Solved in different languages?

Yes, where applicable, CBSE Class 10 Science Question Paper 2021 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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