PHYSICAL AND CHEMICAL CHANGE IS MATTER AROUND US PURE 02 Class 9th Science (Chemistry) (Practice Sheet) 1 Which type of change involves the formation of a new substance? A. Physical change B. Chemical change C. Both D. Neither 2 What is a characteristic of physical changes? A. Formation of new substances B. Reversibility C. Absorption of a lot of heat D. Change in identity 3 In a chemical change, what happens to the mass of the substances involved? A. Mass increases B. Mass decreases C. Mass remains the same D. Mass becomes zero 4 Which process involves the burning of magnesium ribbon? A. Physical change B. Chemical change C. Both D. Neither 5 What is a characteristic of chemical changes? A. Reversibility B. Formation of new substances C. No heat or light energy exchange D. Identity remains unchanged 6 Give an example of a physical change and explain why it is reversible. 7 Explain the concept of identity change in chemical changes with an example. 8 Why is the mass of a substance considered constant in a physical change? 9 Provide an example of a chemical change and describe why it is irreversible. 10 Differentiate between physical and chemical changes based on the exchange of heat or light energy. Page 1 Email: Phone No: Website:
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