This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 5 Physical And Chemical Changes – Quiz 22 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 22 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Think this through:Can the same substance undergo both a physical and a chemical change at the same time. A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 2. Water begins to boil and turn to a gas at what temperature? A) 40 degrees Celsius. B) 100 degrees Celsius. C) 90 degrees Celsius. D) 0 degrees Celsius. Show Answer Correct Answer: B) 100 degrees Celsius. 3. List two properties of physical changes. A) Physical changes always result in a change in color. B) Physical changes only occur in solids. C) Physical changes always involve a change in temperature. D) 1. Physical changes do not change the chemical composition of a substance. 2. Physical changes are usually reversible. Show Answer Correct Answer: D) 1. Physical changes do not change the chemical composition of a substance. 2. Physical changes are usually reversible. 4. Digesting food A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical. 5. The process in which substances known as reactants, are converted into new substances known as products. A) Chemical Reaction. B) Chemical Change. C) Reactants. D) Products. Show Answer Correct Answer: A) Chemical Reaction. 6. Which of these best describes physical properties? A) Physical properties behave identically for all matter under the same conditions. B) Physical properties can be observed without changing the identity of a substance. C) Physical properties include flammability. D) Physical properties cause atoms and molecules to change structure when substances are mixed. Show Answer Correct Answer: B) Physical properties can be observed without changing the identity of a substance. 7. Which object would be most likely to rust? A) A plastic comb. B) A glass marble. C) A paper clip. D) An iron nail. Show Answer Correct Answer: D) An iron nail. 8. Which of these is NOT a chemical change during a reaction? A) Digesting food. B) Burning wood. C) Rusting metal. D) Folding paper. Show Answer Correct Answer: D) Folding paper. 9. Heating a solid until it changes color and produces an odor, and noting the solid cannot be changed back is an example of A) Physical Change. B) Chemical Change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical Change. 10. Acid in stomach, breaking down food. A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical change. 11. When water freezes ..... A) Heat is removed, and a solid is formed. B) Heat is removed and a liquid is formed. C) Heat is added and a solid is formed. D) Heat is added and a liquid is formed. Show Answer Correct Answer: A) Heat is removed, and a solid is formed. 12. Tearing paper into small pieces is an example of a A) Mixture. B) Physical change. C) Chemical change. D) None of the above. Show Answer Correct Answer: B) Physical change. 13. I had a apple;i cut it and kept it for a while.my mom says that both physical and chemical changes had taken place.is she A) Right. B) Wrong. C) All the above. D) None of the above. Show Answer Correct Answer: A) Right. 14. Anything that occupies space and has mass, existing in three states-solid, liquid, and gas. A) Matter. B) Mass. C) Volume. D) Solubility. Show Answer Correct Answer: A) Matter. 15. Heterotrophs abtain energy from other organism. How do autotrophs(plants) abtain energy? A) They obtain energy by eating other organism. B) They capture radiant energy and make their own food. C) They eat the soil underneath them. D) None of the above. Show Answer Correct Answer: B) They capture radiant energy and make their own food. 16. What is the freezing point of water on the Celsius scale? A) 100 degrees. B) 0 degrees. C) 212 degrees. D) 32 degrees. Show Answer Correct Answer: B) 0 degrees. 17. When iron is exposed to air over a long period of time, it forms rust. This is an example of what? A) A new substance forming. B) Color change:no new substance. C) Shape change:no new substance. D) Burning:a new substance. Show Answer Correct Answer: A) A new substance forming. 18. A ..... change occurs when matter changes size, shape orv form A) Physical. B) Chemical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical. 19. 2H$_{2}$ + O$_{2}$ $\rightarrow$ 2H$_{2}$O What is the product? A) $\rightarrow$. B) 2h $ _ {2} $ or. C) 2h $ _ {2} $ + or $ _ {2} $. D) None of the above. Show Answer Correct Answer: B) 2h $ _ {2} $ or. 20. Scenario:A piece of paper is torn into small pieces. Does a chemical or physical change occur? A) Chemical change. B) Physical change. C) Change in state. D) Change in color. Show Answer Correct Answer: B) Physical change. 21. When two liquids are mixed and a solid is formed, the new solid is called a ..... A) Levitate. B) Precipitate. C) Palpital. D) Bad date. Show Answer Correct Answer: B) Precipitate. 22. Burning is a ..... A) Physical change. B) Physical property. C) Chemical change. D) Chemical property. Show Answer Correct Answer: C) Chemical change. 23. Reacting with vinegar A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical. 24. Rusting cannot be prevented by A) By painting. B) Galvanization. C) By coating paper. D) By coating iron. Show Answer Correct Answer: C) By coating paper. 25. Which activity is an example of a physical change? A) An ice cube melts into liquid water when heated. B) A piece of wood produces heat when it is burned. C) A metal chain rusts when left outside. D) An apple turns brown when it is exposed to air. Show Answer Correct Answer: A) An ice cube melts into liquid water when heated. ← 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