This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 5 Physical And Chemical Changes – Quiz 21 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 21 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Toasting Bread A) Physical Change. B) Chemical Change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical Change. 2. Sound may be produced during a chemical reaction yes or no? A) YES. B) NO. C) All the above. D) None of the above. Show Answer Correct Answer: A) YES. 3. Chemical change is A) Temporary. B) Permanent. C) Either temporary or permanent. D) Neither temporary or permanent. Show Answer Correct Answer: B) Permanent. 4. Gastric juices in the stomach digest food into a thick liquid. This is ..... A) Mechanical digestion. B) Chemical digestion. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical digestion. 5. If you ..... paper, it will result in a chemical change A) Rip. B) Burn. C) Fold. D) Color on. Show Answer Correct Answer: B) Burn. 6. Which one of these is a chemical property? A) Melting point. B) Boiling point. C) Color. D) Flammability. Show Answer Correct Answer: D) Flammability. 7. Fermentation is a A) Physical Change. B) Chemical Change. C) Both physical and chemical change. D) None of above. Show Answer Correct Answer: B) Chemical Change. 8. Which answer shows all four signs of a chemical change? A) A gas forms, ripping, a an precipitate forms, unexpected color change. B) A gas forms, a precipitate forms, an unexpected color change, and light or energy is released. C) A gas forms, an unexpected color change, light or energy is released, and melting or freezing. D) A precipitate forms, an unexpected color change, melting or freezing, and ripping. Show Answer Correct Answer: B) A gas forms, a precipitate forms, an unexpected color change, and light or energy is released. 9. A physical change is generally A) Reversible. B) Irreversible. C) Considerable. D) All of these. Show Answer Correct Answer: A) Reversible. 10. Mom puts a pot of water on the stove and the water begins to boil. A) Endothermic. B) Exothermic. C) All the above. D) None of the above. Show Answer Correct Answer: A) Endothermic. 11. Expansion on heating and contraction on cooling of metals are examples of ..... A) Chemical changes. B) Physical changes. C) Irreversible changes. D) Permanent changes. Show Answer Correct Answer: B) Physical changes. 12. Which is evidence of a physical change? A) Smoke is produced. B) The matter changes its shape. C) A flame forms when mixing matter together. D) The mixed liquids start to bubble and and fizz. Show Answer Correct Answer: B) The matter changes its shape. 13. When the temperature of the water reaches ..... , the water boils, or forms bubbles of gas. A) A. 0$^\circ$C. B) B. 100$^\circ$C. C) C. 50$^\circ$C. D) None of the above. Show Answer Correct Answer: B) B. 100$^\circ$C. 14. The gradual breaking down or discoloration of materials due to chemical reactions with the environment. A) Combustion. B) Solubility. C) Corrosion. D) Decomposition reaction. Show Answer Correct Answer: C) Corrosion. 15. A solution is a mixture of one or more substances ..... evenly into another substance. A) Carried. B) Split. C) Dissolved. D) Evaporated. Show Answer Correct Answer: C) Dissolved. 16. What happens to the mass during a chemical change? A) The mass remains the same. B) The mass fluctuates. C) The mass increases. D) The mass decreases. Show Answer Correct Answer: A) The mass remains the same. 17. Iron's ability to rust is an example of a ..... A) Physical Property. B) Physical Change. C) Chemical Property. D) Chemical Change. Show Answer Correct Answer: C) Chemical Property. 18. Stanley left an ice cube on his kitchen counter. An hour later, Stanley observed that the ice cube melted. Which statement best describes this change? A) Ice melting is a physical change because a new substance is created. B) Ice melting is a chemical change because a new substance is created. C) Ice melting is a chemical change because it may be reversed. D) Ice melting is a physical change because it may be reversed. Show Answer Correct Answer: D) Ice melting is a physical change because it may be reversed. 19. Students heat a white solid in a test tube over a flame. What observation would tell the students that the solid has become a new substance? A) The temperature of the solid increases. B) The color of the solid changes to amber. C) The solid begins to melt within the test tube. D) The solid in in the form of crystals. Show Answer Correct Answer: B) The color of the solid changes to amber. 20. Which of these is a chemical property or chemical change? A) 4 bananas are all the same size and shape. B) The bananas all have a bumpy texture. C) The bananas are cut into slices. D) The bananas turn brown after sitting out for a day. Show Answer Correct Answer: D) The bananas turn brown after sitting out for a day. 21. Dyeing your hair blue for the pep rally is an example of a ..... A) Physical Property. B) Physical Change. C) Chemical Property. D) Chemical Change. Show Answer Correct Answer: B) Physical Change. 22. The fact that gold can not react with oxygen is an example of a ..... A) Physical Property. B) Physical Change. C) Chemical Property. D) Chemical Change. Show Answer Correct Answer: C) Chemical Property. 23. Heat water in a pan on a stove, and observe the steam that forms as the state of matter of the water changes.What type of change is above? A) Chemical Change. B) Physical Change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical Change. 24. The amount of space occupied by an object or substance, measured in cubic units. A) Matter. B) Mass. C) Volume. D) Solubility. Show Answer Correct Answer: C) Volume. 25. Give an example of a physical change. A) Boiling water into steam. B) Melting ice into water. C) Burning wood into ash. D) Mixing salt and water. Show Answer Correct Answer: B) Melting ice into water. ← 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