GENERAL SCIENCE CLASS 7 Physical and Chemical Changes Chapter 7 MCQS by Halar GabolFebruary 2, 2024April 16, 2024 Physical and Chemical Changes ( PART 2 ) 1. Which of the following is NOT a characteristic of a chemical change? Formation of new substances Change in energy Reversibility Change in color 2. What type of change occurs when iron rusts? Mechanical change Chemical change Thermal change Physical change 3. Which of the following statements is true about a chemical change? It does not involve the formation of new substances It involves a change in the chemical composition of substances It can be easily reversed It only involves a change in physical properties 4. Which of the following is an example of a physical change? Burning wood Baking a cake Cutting paper into pieces Digesting food 5. When sugar dissolves in water, it is an example of: Nuclear change Chemical change Physical change Biological change 6. Which of the following is NOT an example of a chemical change? Rusting of iron Dissolving salt in water Cooking an egg Burning a candle 7. What happens when vinegar reacts with baking soda? Only a change in temperature Formation of a new substance No change occurs Physical change 8. Which of the following is NOT a sign of a chemical change? Change in shape Change in temperature Change in color Formation of gas bubbles 9. Which of the following statements is true about physical changes They always produce new substances. They involve a change in chemical composition. They only involve a change in state. They are always irreversible. 10. Mixing sugar and water is an example of: Chemical change Biological change Physical change Nuclear change Loading … Pages: 1 2 3 4
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