NCERT MCQs Class 10 General Science Chapter 1 Chemical Reactions and Equations
NCERT MCQ of Class 10 General Science Chapter 1 Chemical Reactions and Equations 1. Which of the following is a balanced chemical equation? (a) H₂ + O₂ → H₂O (b) 2H₂ + O₂ → 2H₂O (c) H₂ + 2O₂ → H₂O₂ (d) None of the above Answer: (b) 2H₂ + O₂ → 2H₂O Explanation: A balanced chemical equation has equal numbers of each type of atom on both sides. Here, the number of hydrogen and oxygen atoms is balanced. 2. What type of reaction is represented by the equation: Zn + CuSO₄ → ZnSO₄ + Cu? (a) Combination reaction (b) Decomposition reaction (c) Displacement reaction (d) Double displacement reaction Answer: (c) Displacement reaction Explanation: Zinc displaces copper from copper sulfate to form zinc sulfate and copper, making it a displacement reaction. 3. Which of the following is an example of a decomposition reaction? (a) 2Mg + O₂ → 2MgO (b) CaCO₃ → CaO + CO₂ (c) H₂ + Cl₂ → 2HCl (d) NaCl + AgNO₃ → NaNO₃ + AgCl Answer:...