What happens when we respire?

Physical reaction with carbon dioxide

What is a word-equation?

Describes a chemical reaction in symbols

Describes a chemical reaction in words

What is a balanced chemical equation?

Equal number of atoms on both sides

Unequal number of atoms on both sides

What is a combination reaction?

One substance breaks down into two or more

Two or more substances form one product

Two products form one substance

What is a precipitation reaction?

Formation of an insoluble product

What is the balanced equation for the reaction between barium chloride and aluminium sulphate?

3BaCl2 + Al2(SO4)3 → 2BaSO4 + 3AlCl3

3BaCl2 + Al2(SO4)3 → 3BaSO4 + 2AlCl3

BaCl + Al2(SO4)3 → BaSO4 + AlCl

BaCl2 + Al2(SO4)3 → BaSO4 + AlCl3

NCERT Solutions Class 10 Science Chapter 1 – Chemical Reactions and Equations

Class 10 Science

Last Updated: 31 May 2026

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Practice MCQ Questions (28 questions)

Q1. What happens when milk is left at room temperature during summers?

Q2. What changes occur when an iron nail is left exposed to humid atmosphere?

Q3. What process occurs when grapes get fermented?

Q4. What is the result of cooking food?

Q5. What changes occur during the digestion of food in our body?

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NCERT Solutions Class 10 Science Chapter 1 – Chemical Reactions and Equations

Important Points

Practice MCQ Questions (28 questions)

Q1. What happens when milk is left at room temperature during summers?

Q2. What changes occur when an iron nail is left exposed to humid atmosphere?

Q3. What process occurs when grapes get fermented?

Q4. What is the result of cooking food?

Q5. What changes occur during the digestion of food in our body?

Q6. What happens when we respire?

Q7. What is a chemical reaction?

Q8. What is a word-equation?

Q9. What is the skeletal chemical equation?

Q10. What is a balanced chemical equation?

Q11. What is a combination reaction?

Q12. What is thermal decomposition?

Q13. What is an exothermic reaction?

Q14. What is an endothermic reaction?

Q15. What is a displacement reaction?

Q16. What is a double displacement reaction?

Q17. What is a precipitation reaction?

Q18. What is oxidation?

Q19. What is reduction?

Q20. What is corrosion?

Q21. What is rancidity?

Q22. Why should a magnesium ribbon be cleaned before burning in air?

Q23. What is the balanced equation for the reaction between hydrogen and chlorine?

Q24. What is the balanced equation for the reaction between barium chloride and aluminium sulphate?

Q25. What is the balanced equation for the reaction between sodium and water?

Q26. What happens during the decomposition of calcium carbonate?

Q27. What is the balanced equation for the reaction between zinc and hydrochloric acid?

Q28. What is the difference between exothermic and endothermic reactions?

Frequently Asked Questions (FAQ)

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