This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 5 Physical And Chemical Changes – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 15 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When heat is removed, molecules in the water slow down, causing the liquid to become a solid. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 2. A particle made of one or more atoms A) Molecule. B) Atom. C) Robot. D) None of the above. Show Answer Correct Answer: A) Molecule. 3. Glass breaking A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical. 4. Wood burned in a fireplace A) Chemical Change. B) Physical Change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical Change. 5. Growth of fingernails is an example of fast change. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 6. Shredding a piece of paper A) Chemical Change. B) Physical Change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical Change. 7. Consider the chemical equation CH$_{4}$ + 2 O$_{2}$ $\rightarrow$ CO$_{2}$ + 2 H$_{2}$O. In this equation, CH$_{4}$ is a A) Product. B) Reactant. C) Displacement. D) None of the above. Show Answer Correct Answer: B) Reactant. 8. Burning of a matchstick is a fast change. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 9. Water being heated and changed to steam is an example of a ..... A) Physical Property. B) Physical Change. C) Chemical Property. D) Chemical Change. Show Answer Correct Answer: B) Physical Change. 10. What type of change occurs when enzymes in saliva break down carbohydrates? A) Physical change. B) Chemical change. C) Mechanical digestion. D) No change. Show Answer Correct Answer: B) Chemical change. 11. Which one of the following statements is correct?Statement 1:Heating a solution increases the solubility of solute.Statement 2:Heating of a saturated solution leads to dissolution of moresolute in it. A) Only statement 1 is correct. B) Only statement 2 is correct. C) Both statements 1 and 2 are correct. D) Neither statement 1 nor statement 2 are correct. Show Answer Correct Answer: C) Both statements 1 and 2 are correct. 12. A transformation in a substance's appearance or state without altering its chemical composition. Sometimes the changes can be undone. Example:melting ice. A) Chemical change. B) Physical change. C) Decomposition reaction. D) Solubility. Show Answer Correct Answer: B) Physical change. 13. In an experiment, a student mixes two clear liquids and observes the formation of a solid precipitate. What type of change is this? A) Physical change. B) Chemical change. C) Mechanical change. D) Electrical change. Show Answer Correct Answer: B) Chemical change. 14. Cooking scrambled eggs for breakfast is an example of a ..... A) Physical Property. B) Physical Change. C) Chemical Property. D) Chemical Change. Show Answer Correct Answer: D) Chemical Change. 15. Density, melting point, boiling point:These may all be classified as A) Chemical properties. B) Physcial properties. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physcial properties. 16. Which of the following statements is true about the digestion process? A) All changes in digestion are physical changes. B) Chemical changes in digestion involve breaking down food molecules. C) Physical changes in digestion involve altering the chemical structure of food. D) Digestion does not involve any chemical changes. Show Answer Correct Answer: B) Chemical changes in digestion involve breaking down food molecules. 17. Milk turning sour is an example of a ..... A) Physical Property. B) Physical Change. C) Chemical Property. D) Chemical Change. Show Answer Correct Answer: D) Chemical Change. 18. If two clear liquids of the same exact temperature are combined and create a new blue colored liquid, what kind of change has occurred? A) Chemical change. B) Physical Change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical change. 19. Which is not evidence that a chemical reaction has occured A) Production of flames. B) Change in temperature or heat. C) Freezing. D) Production of light. Show Answer Correct Answer: C) Freezing. 20. Any change in the state of matter of a substance is a ..... A) Physical Change. B) Chemical Change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical Change. 21. Luster:Chemical or Physical Property A) Chemical Property. B) Physical Property. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical Property. 22. Which of the following would this be considered a chemical in matter? A) Food is torn into smaller pieces by grinding or smashing of food before swallowing. B) Sand and water are mixed to form sandy water. C) Waves crashing against rocks smashing them into smaller pieces. D) Water evaporating from a sidewalk after a rainstorm. E) Carbohydrates must be broken down into sugar to get energy. Show Answer Correct Answer: E) Carbohydrates must be broken down into sugar to get energy. 23. Melting Point:Chemical or Physical Property A) Chemical Property. B) Physical Property. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical Property. 24. Alka-Seltzer gives off carbon dioxide when added to water A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical change. 25. Which produces a physical change? A) Eating a marshmallow. B) Tearing open a bag of chips. C) Striking a match causing it to light. D) Mixing powders that create a gas. Show Answer Correct Answer: B) Tearing open a bag of chips. ← 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