This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Physical And Chemical Changes > 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 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When baking and cooking, what kind of changes do you see? A) Physical. B) Chemical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical. 2. Baking soda and vinegar combine to make carbon dioxide A) Chemical Change. B) Physical Change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical Change. 3. What happens to the molecules of a substance during a physical change? A) They are created. B) They remain the same but are rearranged. C) They are destroyed. D) They are rearranged to form new substances. Show Answer Correct Answer: B) They remain the same but are rearranged. 4. When water boils, how does the arrangement and the movement of molecules change? A) There is no change in the molecules. B) The molecules spread out and can move faster. C) The molecules spread out and move slower. D) The molecules get closer together and move faster. Show Answer Correct Answer: B) The molecules spread out and can move faster. 5. Crystallisation is an example of A) Reversible chemical change. B) Irreversible chemical change. C) Irreversible physical change. D) Reversible physical change. Show Answer Correct Answer: D) Reversible physical change. 6. Physical properties are A) Properties that can be observed without changing the identity of the substance. B) Properties that describe how a substance changes into a completely different substance. C) All the above. D) None of the above. Show Answer Correct Answer: A) Properties that can be observed without changing the identity of the substance. 7. The process of converting radiant energy from the sun into chemical energy stored in a molecule is called A) Carbon dioxide. B) Mitochondria. C) Cellular respiration. D) Photosynthesis. Show Answer Correct Answer: D) Photosynthesis. 8. What state is water in when it freezes? A) Gas. B) Solid. C) Plasma. D) Liquid. Show Answer Correct Answer: B) Solid. 9. Food that rots in the fridge is what type of change? A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical. 10. What does boiling point mean? A) The tempurture at which a liquid boils. B) The tempurture at which a substance boils. C) The Tempurture at which a solid boils. D) None of the above. Show Answer Correct Answer: B) The tempurture at which a substance boils. 11. Changes in which new substances are formed are ..... changes. A) Colour. B) Physical. C) Odour. D) Chemical. Show Answer Correct Answer: D) Chemical. 12. Bob heated ice until it became a liquid. Which term identifies this change? A) Boiling. B) Freezing. C) Melting. D) Condensing. Show Answer Correct Answer: C) Melting. 13. Percy is cutting the grass and picks up the clippings. He hates lawn work but loves the smell of cut grass. Percy has created a ..... change. A) Physical. B) Chemical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical. 14. A chemical change is when A) The chemical properties change. B) The chemical properties do not change. C) A change where the characteristics do not change the substance. D) None of the above. Show Answer Correct Answer: A) The chemical properties change. 15. What change in matter happens when a perfume evaporates? A) Gas to liquid. B) Liquid to gas. C) All the above. D) None of the above. Show Answer Correct Answer: B) Liquid to gas. 16. Is baking soda mixed with vinegar a chemical change? A) No, because a solid is not formed. B) Yes, because a new gas has been produced. C) No, because a new substance is not formed. D) Yes, because a solid and liquid are combined. Show Answer Correct Answer: B) Yes, because a new gas has been produced. 17. You test by seeing which material can scratch the other material A) Hardness. B) Malleability. C) Density. D) Conductivity. Show Answer Correct Answer: A) Hardness. 18. What is a change in which new substances are formed? A) Physical. B) Chemical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical. 19. Is burning wood a chemical or physical change? A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical. 20. A change where one or more new substances are created. A) Physical Change. B) Chemical Change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical Change. 21. Noah is baking a cake for his family. During which step of preparing the cake did Noah observe a chemical change? A) Mixing the batter together. B) Adding baking soda into the batter. C) Cracking an egg into the batter. D) Baking the cake in the oven. Show Answer Correct Answer: D) Baking the cake in the oven. 22. What happens during a physical change? A) The substance's molecules are rearranged. B) The original substance is unchanged. C) A chemical reaction occurs. D) A new substance is created. Show Answer Correct Answer: B) The original substance is unchanged. 23. The following are examples of physical change EXCEPT ..... A) Pounding rice grains. B) Chopping a piece of wood. C) Slicing a piece of meat. D) Spoilage of milk. Show Answer Correct Answer: D) Spoilage of milk. 24. When heat is removed from a bowl of water, the water will eventually A) Melt. B) Freeze. C) All the above. D) None of the above. Show Answer Correct Answer: B) Freeze. 25. Crushing an aluminum foil is an example of A) Evaporation. B) Physical change. C) Chemical change. D) Waste. Show Answer Correct Answer: B) Physical change. 26. A change in which the original substance can be regained by a change in conditions is called ..... A) A reversible change. B) A physical change. C) A chemical change. D) Both (a) and (b). Show Answer Correct Answer: D) Both (a) and (b). 27. In which activity does the substance change to a new substance? A) Adding sugar to water. B) Milk turning sour. C) Boiling of milk. D) Freezing of water. Show Answer Correct Answer: B) Milk turning sour. 28. In which situation is a chemical reaction not taking place? A) Rusting of an old car in a junk yard. B) Burning gasoline in a car. C) Digestion of food in your body. D) Salt dissolving in water. Show Answer Correct Answer: D) Salt dissolving in water. 29. Frank has an eraser. It has a mass of 4g, and a volume of 2cm$^{3}$. What is its density? A) 24 g/cm$^{3}$. B) 1/2 g/cm$^{3}$. C) 8 g/cm$^{3}$. D) 2 g/cm$^{3}$. Show Answer Correct Answer: D) 2 g/cm$^{3}$. 30. The Law of Conservation of Mass tells us matter can't ..... A) Change temperature. B) Change state of matter. C) Be created or destroyed. D) Change color. Show Answer Correct Answer: C) Be created or destroyed. 31. An ice cream cone melting on a counter top is an example of A) A chemical change. B) A physical change. C) No change. D) Both a physical and a chemical change. Show Answer Correct Answer: B) A physical change. 32. In a chemical reaction, how do the reactants compare to the products? A) They are the same. B) They are different. C) All the above. D) None of the above. Show Answer Correct Answer: B) They are different. 33. How can you identify a physical change? A) By observing changes in the taste of a substance. B) By observing changes in the state, shape, or form of a substance without altering its chemical composition. C) By observing changes in the smell of a substance. D) By observing changes in the color of a substance. Show Answer Correct Answer: B) By observing changes in the state, shape, or form of a substance without altering its chemical composition. 34. Liv lit a match and said it was a physical change. Is she correct? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: B) No. 35. Which best describes a chemical change in paper? A) Filing paper. B) Cutting paper in half. C) Mailing paper. D) Burning paper. Show Answer Correct Answer: D) Burning paper. 36. What is evaporation? A) Liquid to a solid. B) Liquid to a gas. C) Solid to a gas. D) Solid to a liquid. Show Answer Correct Answer: B) Liquid to a gas. 37. Which of the following shows all physical changes? A) A gas forming, melting or freezing, and dissolving. B) Ripping, melting or freezing, and dissolving. C) A precipitate forms, melting or freezing, and dissolving. D) An unexpected color change, dissolving, light or energy is released. Show Answer Correct Answer: B) Ripping, melting or freezing, and dissolving. 38. Which type of digestion breaks food into simpler nutrients that can be used by the cells? A) Chemical. B) Mechanical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical. 39. Which of the following statements describes a physical change? A) Burning wood in a fireplace. B) Metal corroding when dipped in acid. C) Digestion of food in humans. D) Boiling of water on a stove. E) Rusting of iron in nails. Show Answer Correct Answer: D) Boiling of water on a stove. 40. Blue liquid and yellow liquid mixed to make a green liquid A) Chemical Change. B) Physical Change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical Change. 41. Which of the following would be considered a physical property? A) Colour. B) PH. C) Flammability. D) Reactivity. Show Answer Correct Answer: A) Colour. 42. Spoiling of food is a ..... change. A) Physical. B) Chemical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical. 43. Copper tarnishing is an example of a ..... change. A) Physical. B) Chemical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical. 44. Is a change in physical state a chemical or physical change? A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical. 45. A chemical reaction is balanced when A) Both sides have the same elements. B) Both sides have the same number of atoms. C) Same subscripts. D) Same coefficients. Show Answer Correct Answer: B) Both sides have the same number of atoms. 46. During Chemical Reactions, the new substances created are called? A) Products. B) Precipitate. C) Reactants. D) Corrosion. Show Answer Correct Answer: A) Products. 47. Matter goes through a change resulting in a different state of matter. What type of change is most likely occurring? A) Physical. B) Chemical. C) Bases. D) Acids. Show Answer Correct Answer: A) Physical. 48. What can separate magnetic pieces from non-magnetic pieces? A) Magnet. B) Filter. C) Strainer. D) None of the above. Show Answer Correct Answer: A) Magnet. 49. When turning on the Bunsen burner, where should the air holes be? A) It does not matter. B) Open. C) Closed. D) None of the above. Show Answer Correct Answer: C) Closed. 50. Which is a Chemical property? A) Thermal Conductivity. B) Density. C) Malleability. D) Flammability. Show Answer Correct Answer: D) Flammability. 51. A chemical change occurs A) When the substance changes form. B) When one or more substances change into a new substance with different properties. C) When a substance changes color. D) When a substance changes shape. Show Answer Correct Answer: B) When one or more substances change into a new substance with different properties. 52. Exothermic reactions release energy to the surroundings. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 53. Is melting ice a chemical or physical change? A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical. 54. True or False:According to the law of conservation of mass, mass can be created or destroyed during a chemical reaction. A) False. B) Sometimes. C) True. D) Only in certain reactions. Show Answer Correct Answer: A) False. 55. Would enzymes in our saliva that help break down carbohydrates into simple sugars be considered a physical or chemical change? A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical change. 56. A car swerves to avoid a collision with an oncoming vehicle and crashes into a tree. The tree falls over. The car is crunched. Liquids pour out of the car onto the street. Based ONLY on those observations, what happened here? A) Physical Changes. B) Chemical Changes. C) Both Chemical and Physical Changes. D) None of the above. Show Answer Correct Answer: A) Physical Changes. 57. What is burning? A) Physical property. B) Physical change. C) Chemical change. D) Chemical property. Show Answer Correct Answer: C) Chemical change. 58. The formation of a solid when two liquids combine is called? A) Solubility. B) Freezing. C) Solidification. D) Precipitate. Show Answer Correct Answer: D) Precipitate. 59. Saliva breaking down carbohydrates into sugars is ..... A) Physical/mechanical. B) Chemical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical. 60. For the equation:2H$_{2}$ + O$_{2}$ $\rightarrow$ 2H$_{2}$OHow much H$_{2}$O will be produced if we react 4g of H$_{2}$ and 32g of O$_{2}$? A) Hgum. B) 28g. C) 32g. D) Sneeze. Show Answer Correct Answer: D) Sneeze. ← PreviousNext →Related QuizzesScience QuizzesClass 7 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books