GENERAL SCIENCE CLASS 7 Physical and Chemical Changes Chapter 7 MCQS by Halar GabolFebruary 2, 2024April 16, 2024 Physical and Chemical Changes ( PART 3 ) 1. Which of the following is a chemical change? Breaking a glass Cooking an egg Melting ice cream Cutting paper into pieces 2. What happens when iron is heated strongly in the presence of air? It evaporates It rusts It forms a new substance It melts 3. Which of the following is NOT a characteristic of a chemical change? Change in energy Change in state Formation of new substances Change in color 4. Which of the following is a physical change? Fermenting grapes to make wine Digesting food in the stomach Burning wood to produce ash Boiling water to produce steam 5. When milk turns into curd, it is an example of: Physical change Nuclear change Biological change Chemical change 6. Which of the following is a sign of a chemical change? Change in state Change in size Change in shape Change in temperature 7. Which of the following is an example of a chemical change? Sharpening a pencil Mixing salt and sugar Burning a candle Melting chocolate 8. Which of the following is NOT a sign of a chemical change? Change in temperature Formation of a precipitate Change in size Change in odor 9. Mixing iron filings and sulfur powder and then heating the mixture is an example of: Biological change Nuclear change Physical change Chemical change 10. What happens when milk is left at room temperature for a long time? Chemical change Physical change Nuclear change Biological change Loading … Pages: 1 2 3 4
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