CBSE Class 10 Science Question Paper 2020 Set 02 Solved

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Official CBSE Exam Papers for Class 10 Science

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CHEMICAL REACTIONS AND EQUATIONS
 
One mark questions
 
1. What change in color is observed when white silver chloride is left exposed to sunlight? State the type of chemical reaction in this change.
 
2. Why do gold and platinum not corrode in moist air ?
 
3. A magnesium ribbon is burnt in oxygen to give a white compound X accompanied by the emission of light . if the burning ribbon is now placed in an atmosphere of nitrogen, it forms a compound Y . write the chemical formulae of X and Y.
 
4. Name the reducing agent in the following reaction :
 
3MnO2 + 4Al → 3Mn + 2Al2O3
 
Two mark questions
 
5. Why do fireflies glow at night?
 
6. Write balanced chemical equations for the reactions that take place during respiration. Identify the type of combination reaction that takes place during this process and justify the name. Give one more example of this type of reaction.
 
7. A zinc plate put into a solution of copper sulphate kept in a glass container. It was found that blue color of the solution gets fader with the passage of time. After a few days, when zinc plate was taken out of the solution, a number of holes were observed on it.
 
i. State the reasons for the changes observed on the zinc plate.
 
ii. Write the chemical equation for the reaction involved.
 
8. Write a balanced chemical equation for the reaction between sodium chloride and silver nitrate indicating the physical state of the reactions and the products.
 
9. Consider the following chemical reaction:
 
X + barium chloride ______________ Y + sodium chloride (white ppt)
 
a) Identify ‘X’ and ‘Y’
 
b) Name the type of reaction.
 
Three mark questions
 
10.When you have mixed the solutions of lead (II) nitrate and potassium  iodide,
 
i. What was the color of the precipitate formed and, can you name the precipitate?
 
ii. Write the balanced chemical equation for this reaction.
 
iii. Is this also a double displacement reaction?
 
11.Write the chemical equation of the reaction in which the following changes have taken place with an example of each :
 
I. Change in color
 
II. Change in temperature
 
III. Formation of precipitate

 

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

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CBSE Class 10 Science Question Paper 2020 Set 02 Solved & Previous Year Question Papers for Class 10 Science

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FAQs

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

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

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

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

Yes, where applicable, CBSE Class 10 Science Question Paper 2020 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 Question Paper 2020 Set 02 Solved, are provided free of charge in mobile-friendly PDF.