INTRODUCTION CHEMICAL REACTIONS AND EQUATIONS 01 Class 10th Chemistry (Practice Sheet) 1 What is a chemical reaction? A. A physical change of substances B. A change in temperature C. A rearrangement of atoms resulting in new substances D. A change in colour 2 What are the substances that take part in a chemical reaction called? A. Catalysts B. Products C. Reactants D. Byproducts 3 Which characteristic is associated with the combustion of candle wax? A. Evolution of gas B. Change in color C. Change in state of substance D. Change in temperature 4 What is the purpose of cleaning the magnesium ribbon before burning it in air? A. To make it shiny B. To remove the protective layer of basic magnesium carbonate C. To change its colour D. To make it lighter 5 Which of the following is an example of anaerobic cellular respiration? A. Combustion B. Photosynthesis C. Fermentation D. Aerobic respiration 6 What is a chemical reaction, and how does it differ from a physical change? 7 What is the difference between the reactants and the products in a chemical reaction? 8 What is the process of Rusting of Iron? 9 Explain the characteristics of a chemical reaction using specific examples. 10 What is the difference between anaerobic and aerobic respiration? Page 1 Email: Phone No: Website:
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