NCERT Class 10 Science Questions and Answers PDF

NCERT Class 10 Science - 1000+ Questions and Answers ## Chapter 1: Chemical Reactions and Equations ### Book Questions 1. What is a chemical reaction? Give an example. **Answer:** A chemical reaction is a process in which reactants are transformed into products with a change in chemical composi...

NCERT Class 10 Science - 1000+ Questions and Answers ## Chapter 1: Chemical Reactions and Equations ### Book Questions 1. What is a chemical reaction? Give an example. **Answer:** A chemical reaction is a process in which reactants are transformed into products with a change in chemical composition. Example: 2H + O 2HO (Formation of water) 2. What is a balanced chemical equation? Why should chemical equations be balanced? **Answer:** A balanced chemical equation has an equal number of atoms of each element on both sides of the equation, ensuring the law of conservation of mass is followed. ### Additional Competitive Exam Questions 3. Which of the following is an example of a redox reaction? a) NaCl Na + Cl b) H + Cl 2HCl c) AgNO + NaCl AgCl + NaNO d) HCl + NaOH NaCl + HO **Answer:** b) H + Cl 2HCl 4. Which type of reaction is represented by the following equation? Fe + CuSO FeSO + Cu a) Combination reaction b) Decomposition reaction c) Displacement reaction d) Redox reaction **Answer:** c) Displacement reaction... (Content continues for all chapters)