This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 5 Physical And Chemical Changes – Quiz 30 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 30 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following is NOT evidence of a chemical change? A) The temperature changes. B) A gas forms. C) A precipitate forms. D) A state of matter change happens. Show Answer Correct Answer: D) A state of matter change happens. 2. What happens to the particles during a physical change? A) The particles lose mass during a physical change. B) The particles become radioactive during a physical change. C) The particles change into a different element during a physical change. D) The particles do not change their identity or composition during a physical change. Show Answer Correct Answer: D) The particles do not change their identity or composition during a physical change. 3. Adding ..... to water will result in a chemical change A) An antacid tablet. B) Salt. C) Sugar. D) Oil. Show Answer Correct Answer: A) An antacid tablet. 4. A house mad of toy blocks is weighed. It is taken apart and each block weighed separately. If the weight of all the blocks is added, what will it total? A) A little more than the weight of the house. B) A little less than the weight of the house. C) The same as the house. D) The amount of 10 toy blocks. Show Answer Correct Answer: C) The same as the house. 5. Which process is a physical change? A) Burning paper. B) Rusting iron. C) Boiling water. D) Baking a cake. Show Answer Correct Answer: C) Boiling water. 6. Blow drying my hair is an example of a physical change. What is the evidence of this? A) State Change. B) Fire. C) New substance. D) Color Change. Show Answer Correct Answer: A) State Change. 7. In chemical and physical changes, mass is not created or destroyed but is only transformed into different substances. A) Chemical change. B) Physical change. C) Law of conservation of mass. D) Physical property. Show Answer Correct Answer: C) Law of conservation of mass. 8. Which of the following is NOT a clue that a chemical change has occurred? A) Change of state of matter. B) Color change. C) Production of a gas. D) Production of heat. Show Answer Correct Answer: A) Change of state of matter. 9. According to the law of conservation of matter, which statement about chemical reactions is true? A) Energy is created as atoms are destroyed in chemical reactions. B) Atoms cannot be created or destroyed by chemical reactions. C) Every atom destroyed in a chemical reaction must be replaced. D) Atoms are created by some reactions and destroyed by others. Show Answer Correct Answer: B) Atoms cannot be created or destroyed by chemical reactions. 10. A substance with a definite shape and volume is a ..... A) Solid. B) Liquid. C) Gas. D) None of the above. Show Answer Correct Answer: A) Solid. 11. A change in size, shape, or state of matter that does not change into a new kind of matter is a A) Product. B) Chemical change. C) Physical change. D) Reactant. Show Answer Correct Answer: C) Physical change. 12. Water freezes at 0$^\circ$C A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical change. 13. Which of the following is an example of chemical change? A) Filling up a balloon with hot air. B) Taking a glass of water and freezing it by placing it in the freezer. C) A plant collecting sunlight and turning it into food. D) Your dog ripping up your homework. Show Answer Correct Answer: C) A plant collecting sunlight and turning it into food. 14. The best way to separate a mixture of peas and sand is by A) Using a strainer. B) Evaporation. C) Use a magnet. D) Burn it. Show Answer Correct Answer: A) Using a strainer. 15. Define physical change A) A change that changes only the physical traits of the substance, without making any change in their internal structure. B) A change that changes by affecting the internal structure of the substance to form a new substance. C) All the above. D) None of the above. Show Answer Correct Answer: A) A change that changes only the physical traits of the substance, without making any change in their internal structure. 16. What are the evidences of a chemical change? A) Change in volume. B) Change in texture. C) Formation of a precipitate, change in color, release of gas, and absorption or release of heat. D) Change in state of matter. Show Answer Correct Answer: C) Formation of a precipitate, change in color, release of gas, and absorption or release of heat. 17. Identify the chemical change from the following: A) Melting of wax. B) Digestion of food. C) Tearing of paper. D) Melting of ice. Show Answer Correct Answer: B) Digestion of food. 18. Which is evidence a chemical change is taking place? A) Smoke is produced. B) The item changes sizes. C) The item changes shape. D) The item melts. Show Answer Correct Answer: A) Smoke is produced. 19. Which is NOT a physical change? A) Cutting a pizza into equal slices. B) Ice cubes melting back into liquid. water. C) Baking cupcakes. D) A chocolate bar melting. Show Answer Correct Answer: C) Baking cupcakes. 20. The esophagus goes through a process knows as peristalsis which transports food from the mouth to the stomach. Is peristalsis an example of physical or chemical change in digestion? A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical change. 21. Sodium Hydroxide dissolves in water A) Chemical Change. B) Physical Change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical Change. 22. Food is digested in the stomach A) Chemical Change. B) Physical Change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical Change. 23. Caroline left an ice cube on the kitchen counter. An hour later, she notices that the ice has changed.What evidence would Caroline have observed that shows a physical change has occurred? A) The ice melted to form a liquid. B) The ice is now colder. C) The ice melted to form a solid. D) The ice is now clear. Show Answer Correct Answer: A) The ice melted to form a liquid. 24. Which of the following is evidence of a chemical reaction? A) Fizzing. B) Water changing to ice. C) Saltwater. D) Paper being cut in half. Show Answer Correct Answer: A) Fizzing. 25. This changes the matter into something completely different. 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