This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 5 Physical And Chemical Changes – Quiz 29 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 29 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A physical change is a change A) In an item's properties like its shape, size or density. B) That creates a new substance or emits light or heat. C) That creates a smell. D) That cannot be undone. Show Answer Correct Answer: A) In an item's properties like its shape, size or density. 2. Sodium and potassium react violently with water A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical change. 3. Involves how a substance will interact with something else A) Physical change. B) Chemical change. C) Chemical property. D) Physical property. Show Answer Correct Answer: B) Chemical change. 4. Which of the following changes is accompanied by sound? A) Photosynthesis. B) Spoilage of food. C) Explosion of fire works. D) Crumpling of paper. Show Answer Correct Answer: C) Explosion of fire works. 5. A different chemical substance is formed when: A) A cloth is cut. B) A cup breaks. C) A nail rusts. D) A piece of wood breaks. Show Answer Correct Answer: C) A nail rusts. 6. At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products? A) The product is doubled. B) The product is half the mass of the reactants. C) The mass is the same. D) The mass changes depending on the reaction. Show Answer Correct Answer: C) The mass is the same. 7. Scenario:Wood burns and turns into ash. Does a chemical or physical change occur? A) Change in state. B) No change occurs. C) Physical change. D) Chemical change. Show Answer Correct Answer: D) Chemical change. 8. Which property is an example of a chemical property? A) The ability to burn. B) The ability to dissolve. C) The ability to evaporate. D) The ability to melt. Show Answer Correct Answer: A) The ability to burn. 9. Which pair of substances when mixed together form a new substance that has different properties than the original substances? A) Salt + water. B) Sugar + water. C) Vinegar + baking soda. D) Food coloring + milk. Show Answer Correct Answer: C) Vinegar + baking soda. 10. When particles at the surface of a liquid move upward and turn into gas, ..... occurs. A) Evaporation. B) Boiling. C) Freezing. D) Melting. Show Answer Correct Answer: A) Evaporation. 11. What kind of change results in a new substance? A) Chemical change. B) Physical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical change. 12. What stays the same when there is a physical change? A) Density. B) Volume. C) Neither. D) None of the above. Show Answer Correct Answer: B) Volume. 13. The process of depositing a thin layer of zinc on iron objects is called ..... A) Galvanization. B) Crystallization. C) Painting. D) None of the above. Show Answer Correct Answer: A) Galvanization. 14. "Adding salt to water changes the taste of water." Which of the following statements is true regarding this change? A) It is a chemical change because a new substance is formed. B) It is a physical change because the original substance can be recovered. C) It is a chemical change because the salt cannot be recovered. D) It is a physical change because there is a slight change in colour. Show Answer Correct Answer: B) It is a physical change because the original substance can be recovered. 15. Which is an example of chemical change? A) Slicing a potato. B) Boiling water. C) Copper metal turning green. D) None of the above. Show Answer Correct Answer: C) Copper metal turning green. 16. How many states of matter can be observed in everyday life? A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: C) 3. 17. Glass tumbler breaking into pieces is a A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical change. 18. Which would most likely cause a substance to melt? A) Addition of heat. B) Removal of heat. C) Increase in mass. D) Decrease in mass. Show Answer Correct Answer: A) Addition of heat. 19. The sugar in my lemonade seems to disappear when I stir it. This is called ..... A) Solubility. B) Solid. C) Mixture. D) None of the above. Show Answer Correct Answer: A) Solubility. 20. Water condenses on the side of your glass of cold lemonade. A) Endothermic. B) Exothermic. C) All the above. D) None of the above. Show Answer Correct Answer: B) Exothermic. 21. Elements combine in fixed ratio based on their ..... to form compounds. A) Valencies. B) Atom. C) All the above. D) None of the above. Show Answer Correct Answer: A) Valencies. 22. Your car burns gasoline as you drive from home to school A) Endothermic. B) Exothermic. C) All the above. D) None of the above. Show Answer Correct Answer: B) Exothermic. 23. Which of the following is NOT an indication of a chemical change? A) Production of light. B) Production of gas. C) Production of odor. D) Production of water. Show Answer Correct Answer: D) Production of water. 24. Iron pipe rusts A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical change. 25. What happens to the mass of a substance during a physical change? A) The mass of a substance decreases. B) The mass of a substance increases. C) The mass of a substance remains constant. D) The mass of a substance becomes zero. Show Answer Correct Answer: C) The mass of a substance remains constant. ← PreviousNext →Related QuizzesClass 7 Science Chapter 5 Physical And Chemical Changes Quiz 1Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 2Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 3Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 4Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 5Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 6Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 7Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 8Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 9Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books