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? Cooking an egg Breaking a glass Cutting paper into pieces Melting ice cream 2. What happens when iron is heated strongly in the presence of air? It rusts It melts It evaporates It forms a new substance 3. Which of the following is NOT a characteristic of a chemical change? Change in color Change in state Formation of new substances Change in energy 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: Nuclear change Biological change Physical change Chemical change 6. Which of the following is a sign of a chemical change? Change in shape Change in state Change in temperature Change in size 7. Which of the following is an example of a chemical change? Sharpening a pencil Melting chocolate Burning a candle Mixing salt and sugar 8. Which of the following is NOT a sign of a chemical change? Change in odor Formation of a precipitate Change in temperature Change in size 9. Mixing iron filings and sulfur powder and then heating the mixture is an example of: Nuclear change Chemical change Biological change Physical change 10. What happens when milk is left at room temperature for a long time? Physical change Nuclear change Chemical change Biological change Loading … Pages: 1 2 3 4
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