This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 5 Physical And Chemical Changes – Quiz 20 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 20 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Chemical or Physical change?Mowing or cutting the grass A) Chamical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical. 2. An egg can be cooked is a A) Chemical change. B) Physical change. C) Physical property. D) Chemical property. Show Answer Correct Answer: D) Chemical property. 3. When one or more substances combine to make something new A) Chemical property. B) Chemical change. C) Physcial change. D) Mixture. Show Answer Correct Answer: B) Chemical change. 4. Which of the following observations indicates a chemical change has occurred? A) A solid melts into a liquid. B) A liquid evaporates into a gas. C) A color change occurs without external influence. D) A gas condenses into a liquid. Show Answer Correct Answer: C) A color change occurs without external influence. 5. Complete the equation:Magnesium+ Oxygen $\rightarrow$ ..... A) Carbon dioxide. B) Magnesium. C) Magnesium oxide. D) Magnesium hydroxide. Show Answer Correct Answer: C) Magnesium oxide. 6. Which of the following is NOT a characteristic of a physical property? A) Can be observed with senses. B) Changes matter into a new substance. C) Can be determined without destroying matter. D) Includes properties like color and hardness. Show Answer Correct Answer: B) Changes matter into a new substance. 7. What are the two types of mixtures? A) Elements and compounds. B) Elements and pure substances. C) Homogeneous and Heterogeneous. D) Solutes and solvents. Show Answer Correct Answer: C) Homogeneous and Heterogeneous. 8. Mixing lemon and baking soda A) Physical Change. B) Chemical Change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical Change. 9. Salt water is an example of a A) Heterogeneous mixture. B) Element. C) Compound. D) Homogeneous mixture. Show Answer Correct Answer: D) Homogeneous mixture. 10. When a black powder called soot forms around a fireplace after a fire, what process has occurred? A) A chemical reaction occurred when the wood burned forming a new substance called soot. B) The wood evaporated and made a new substance called soot. C) Some bricks in the fireplace melted and made a new substance called soot. D) None of the above. Show Answer Correct Answer: A) A chemical reaction occurred when the wood burned forming a new substance called soot. 11. During a phase change, the temperature A) Increases. B) Decreases. C) Fluctuates. D) Stays the same. Show Answer Correct Answer: D) Stays the same. 12. Would the action churning in the stomach be considered a physical or chemical change? A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical change. 13. Splitting a chocolate bar A) Chemical changes. B) Physical changes. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical changes. 14. You combine 2g of vinegar and 4 g of baking soda in a zip lock bag. The weight of all contents and the bag before the reaction is 7.2 g. What should it weigh after the reaction? A) 6 g. B) Somewhere between 6 & 7.2 g. C) Less than 6 g. D) 7.2 g. Show Answer Correct Answer: D) 7.2 g. 15. A student makes a list of changes observed. 1. water freezing 2. milk curdling 3. iron rusting 4. butter meltingWhich choice correctly classifies the changes observed? A) Physical change 1 and 2chemical change 3 and 4. B) Physical change 1 and 4chemical change 2 and 3. C) Physical change 1 and 3chemical change 2 and 4. D) Physical change 3 and 4chemical change 1 and 2. Show Answer Correct Answer: B) Physical change 1 and 4chemical change 2 and 3. 16. Pooja took a candle in a vessel and heated the vessel. Even though the candle did not burn, it changed its shape and state. What kind of change is this? A) Irreversible change. B) Physical change. C) Chemical change. D) Permanent change. Show Answer Correct Answer: B) Physical change. 17. Nelson put water in a paper cup and weighed it. Then he put the paper cup in the freezer. The water froze. He took the cup out of the freezer and weighed it again. What was the weight after the water froze. A) It is unpredictable. B) It was the same. C) It was less. D) It was more. Show Answer Correct Answer: B) It was the same. 18. Ice melting is an example of a ..... A) Physical Property. B) Physical Change. C) Chemical Property. D) Chemical Change. Show Answer Correct Answer: B) Physical Change. 19. What kind of change occurs if matter changes in amount, size, or shape? A) Substance change. B) Chemical change. C) Physical change. D) Elemental change. Show Answer Correct Answer: C) Physical change. 20. Which of the following are examples of a physical change in matter? A) Cutting paper. B) Burning wood. C) Fireworks exploding. D) Baking soda reacting with vinegar. Show Answer Correct Answer: A) Cutting paper. 21. Is squeezing oranges to make orange juice a physical or chemical change? A) Physical Change. B) Chemical Change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical Change. 22. What type of change is formation of manure? A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical change. 23. The starting materials in a chemical reaction A) Products. B) Reactants. C) Starters. D) Enders. Show Answer Correct Answer: B) Reactants. 24. In ..... change no new substance is formed. A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical change. 25. Burning a piece of paper is an example of a A) Physical Change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical change. ← 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