10 important questions from the chapter "Chemical Reactions and Equations" for Class 10 Science (CBSE/NCERT-based):
1. Define a chemical reaction. Give one example.
2. Write the balanced chemical equation for the following reactions:
a) Magnesium burns in air
b) Zinc reacts with sulphuric acid
3. What is a balanced chemical equation? Why should chemical equations be balanced?
4. Write the chemical equation for the reaction of iron with copper sulphate. Also mention the type of reaction.
5. What is meant by a decomposition reaction? Give one example each of thermal, electrolytic, and photolytic decomposition.
6. Explain the difference between displacement and double displacement reactions with suitable examples.
7. What is oxidation and reduction? Explain with the help of an example.
8. Why is respiration considered an exothermic reaction?
9. What is rancidity? How can it be prevented?
10. Identify the type of chemical reaction and balance the following:
a) Ca(OH)₂ + CO₂ → CaCO₃ + H₂O
b) Na₂SO₄ + BaCl₂ → BaSO₄ + NaCl
Let me know if you want these in worksheet format or Hindi medium as well.
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