This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 5 Physical And Chemical Changes – Quiz 34 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 34 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The best way to separate a mixture of pennies and paper clips is by A) Shape. B) Solution. C) Using a strainer. D) Using a magnet. Show Answer Correct Answer: D) Using a magnet. 2. All changes in nature are reversible. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 3. If there is a change in color, production of light, production of heat, production of gas, production of smell or formation of a new substance. A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical change. 4. Peeling a carrot is an example of a A) Physical property. B) Physical change. C) Chemical property. D) Chemical change. Show Answer Correct Answer: B) Physical change. 5. In a chemical reaction, bonds are broken and new bonds are formed that create new substances. The bonds that are broken are called what? A) Reactants. B) Products. C) Atoms. D) Catalysts. Show Answer Correct Answer: A) Reactants. 6. Which type of change are irreversible? A) Chemical Changes. B) Physical Changes. C) Changes in State. D) Changes in Temperature. Show Answer Correct Answer: A) Chemical Changes. 7. Ductility A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical. 8. Juan observes these properties of an unknown substance. The substance is white, has a crystaline structure, dissolves in water and burns when a flame is applied. What is a chemical property of the substance? A) Color. B) Crystaline structure. C) Dissolves. D) Burns. Show Answer Correct Answer: D) Burns. 9. When lithium metal is dropped into a container of water, the lithium sparks and fizzes and the water begins to bubble violently. The conclusion that can be drawn from that is: A) A new substance is created because this is a chemical change. B) No new substances are created because there is a chemical change. C) No new substances are created because this is a physical change. D) A new substance is created because this is a physical change. Show Answer Correct Answer: A) A new substance is created because this is a chemical change. 10. The chemical name of baking soda is Sodium hydrogencarbonate. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 11. Matter that has its own shape and takes up space. A) Solid. B) Liquid. C) Gas. D) None of the above. Show Answer Correct Answer: A) Solid. 12. A ..... is formed when different substances are combined such that no chemical change occurs. A) Solution. B) Mixture. C) Solution. D) Substance. Show Answer Correct Answer: B) Mixture. 13. When heat is added to a solid, the solid will A) Melt. B) Freeze. C) All the above. D) None of the above. Show Answer Correct Answer: A) Melt. 14. Glass bottle that is shattered A) Chemical Change. B) Physical Change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical Change. 15. What type of change occurs when a new substance is formed that has different properties from the original substances? A) Chemical change. B) Nuclear change. C) Physical change. D) Mutation. Show Answer Correct Answer: A) Chemical change. 16. What are phisical changes? A) They are reversible changes. B) They are not reversible changes. C) Non of these. D) All of these. Show Answer Correct Answer: A) They are reversible changes. 17. Why does a physical change occur when a piece of paper is torn into small pieces? A) The paper disappears completely. B) The paper turns into a different material. C) The size and shape of the paper have been altered without changing its chemical composition. D) The paper becomes invisible. Show Answer Correct Answer: C) The size and shape of the paper have been altered without changing its chemical composition. 18. When molecules are close, but not super close, you are referring to a ..... A) Solid. B) Liquid. C) Gas. D) None of the above. Show Answer Correct Answer: B) Liquid. 19. What is a common indicator of a chemical change when two substances are mixed? A) Change in temperature. B) Change in state. C) Formation of a precipitate. D) Change in texture. Show Answer Correct Answer: C) Formation of a precipitate. 20. Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of oxygen. Which of these is the best evidence that a chemical reaction occurs when coal burns? A) The shape of the coal changes. B) Oxygen is present. C) A new substance is produced. D) Coal is made up of more than one element. Show Answer Correct Answer: C) A new substance is produced. 21. Ice forms because heat is removed, causing the particles to move slower. This changes the water from a liquid to a solid. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 22. What do we know about the mass of the reactants and products of a reaction? A) The products have a greater mass than the reactants. B) The products mass equals the reactants mass. C) The reactants have a greater mass than the products. D) None of the above. Show Answer Correct Answer: B) The products mass equals the reactants mass. 23. What is cooking an egg? A) Chemical change. B) Both physical change and chemical change. C) Neither. D) Physical change. Show Answer Correct Answer: A) Chemical change. 24. Name the gas which turns lime water milky. A) Carbon dioxide. B) Oxygen. C) Nitrogen. D) None of the above. Show Answer Correct Answer: A) Carbon dioxide. 25. True or False:a physical change may produce a new substance. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. ← 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