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 6 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 6 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. An attractive force for some metals. A) Conductivity. B) Magnetism. C) Solubility. D) Mass. Show Answer Correct Answer: B) Magnetism. 2. Which step in the digestive process represents a chemical change in food? A) Storing of swallowed food in the stomach. B) Churning of food liquids and digestive juices in the stomach. C) Movement of food down the esophagus to the stomach. D) Chewing food to break it down into smaller pieces. E) Substances in the mouth and stomach breaking down fats and proteins. Show Answer Correct Answer: E) Substances in the mouth and stomach breaking down fats and proteins. 3. An ice cube melts in a glass of water. Has a chemical reaction taken place? How do you know? A) No, the color did not change. B) Yes, a gas was given off. C) No, a phase change does always not indicate a chemical. D) Yes, a new substance was formed. Show Answer Correct Answer: C) No, a phase change does always not indicate a chemical. 4. When a substance reacts with something else and forms a new substance, this is an example of: A) A physical property. B) A chemical property. C) A physical change. D) Both a and b. Show Answer Correct Answer: B) A chemical property. 5. Which type of change can be undone? A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical. 6. The principle of conservation of mass is true A) Only for reactions that take place in open systems. B) Only for reactions that take place in closed systems. C) For reactions in both open and closed systems. D) For no reactions at all. Show Answer Correct Answer: C) For reactions in both open and closed systems. 7. Kinetic energy is knows as? A) Chemical energy. B) Energy in motion. C) Light energy. D) Sound energy. Show Answer Correct Answer: B) Energy in motion. 8. Any substance that has a mass and takes up space is called A) A box. B) Matter. C) An idea. D) Mass. Show Answer Correct Answer: B) Matter. 9. A combination of two or more substances where each keeps its own properties and can be easily separated A) Mixture. B) Substances. C) Manipulation. D) Change. Show Answer Correct Answer: A) Mixture. 10. Elements are the basic building blocks of matter. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 11. In the context of digestion, what is the primary function of bile? A) To chemically digest proteins. B) To physically break down carbohydrates. C) To emulsify fats for easier digestion. D) To neutralize stomach acid. Show Answer Correct Answer: C) To emulsify fats for easier digestion. 12. A change in some properties of matter that does not form a different kind of matter is a what? A) Temperature change. B) Chemical change. C) Chemical reaction. D) Physical change. Show Answer Correct Answer: D) Physical change. 13. Mrs. Schimmel left a glass of ice on the counter. After 3 hours, Mrs. Schimmel noticed that the ice has melted and is now water. The particles that were in the ice have now (a) A) A. spread apart and are moving faster. B) Spread apart and are moving slower. C) Got closer together and are moving faster. D) None of the above. Show Answer Correct Answer: A) A. spread apart and are moving faster. 14. Which of the following processes best describes a physical change that occurs during digestion A) Stomach acid breaks down proteins. B) Bile breaks down fat. C) Saliva breaking down large molecules into smaller molecules. D) Chewing food to break down large pieces so they can be swallowed. E) Pancreatic enzymes breaking carbohydrates into sugars. Show Answer Correct Answer: D) Chewing food to break down large pieces so they can be swallowed. 15. Which answer below makes a correct statement? A) Physical change only changes the color. B) Physical change only changes the size. C) Physical change changes the matter into something totally different. D) Physical change begins and ends with the same matter. Show Answer Correct Answer: D) Physical change begins and ends with the same matter. 16. Scenario:Mixing baking soda and vinegar causes a foaming reaction. Does a chemical or physical change occur? A) Change in state occurs. B) No change occurs. C) Physical change. D) Chemical change. Show Answer Correct Answer: D) Chemical change. 17. When two liquids are mixed and a solid forms as a result of a reaction, the solid is called a A) Precipitate. B) Perceive. C) Participant. D) Polypeptide. Show Answer Correct Answer: A) Precipitate. 18. Which of the following best describes a chemical change in the digestive system? A) Food is mixed with saliva. B) Proteins are broken down into amino acids. C) Food is swallowed. D) Nutrients are absorbed into the bloodstream. Show Answer Correct Answer: B) Proteins are broken down into amino acids. 19. A process in which one or more substances, the reactants, are converted to one or more different substances, the products A) Chemical change. B) Chemical. C) Chemical reaction. D) Chemical properties. Show Answer Correct Answer: C) Chemical reaction. 20. A chemical change cannot be easily undone. True or False? A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 21. Solubility (dissolves) A) Physical Proeprty. B) Chemical Property. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical Proeprty. 22. What type of change takes place when you separate a mixture A) Physical change. B) Solution. C) Chemical change. D) Mixture. Show Answer Correct Answer: A) Physical change. 23. When a physical change occurs, you begin and end with A) A colorful substance. B) The same substance. C) No substance. D) Different substances. Show Answer Correct Answer: B) The same substance. 24. Magnesium burns with a bright ..... flame. A) Green. B) Blue. C) Red. D) White. Show Answer Correct Answer: D) White. 25. In a physical change physical properties of the substance is changed A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 26. Megan lights a candle and watches it burn. She observes that some wax melts, some smoke comes from the wick, the wick burns, and then the melted wax hardens again.Which represent chemical changes? A) The wick burns, and smoke comes from the wick. B) Some wax melts, and smoke comes from the wick. C) Some wax melts, and later melted wax hardens again. D) Smoke comes from the wick, and later melted wax hardens again. Show Answer Correct Answer: A) The wick burns, and smoke comes from the wick. 27. 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. 28. 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. 29. 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. 30. 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. 31. 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. 32. 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. 33. 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. 34. Water being heated and changed to steam is an example of a ..... A) Physical Change. B) Chemical Change. C) Physical Property. D) Chemical Property. Show Answer Correct Answer: A) Physical Change. 35. What type of change occurs when enzymes in saliva break down carbohydrates? A) Chemical change. B) Physical change. C) No change. D) Mechanical digestion. Show Answer Correct Answer: A) Chemical change. 36. 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. 37. 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) Decomposition reaction. C) Physical change. D) Solubility. Show Answer Correct Answer: C) Physical change. 38. In an experiment, a student mixes two clear liquids and observes the formation of a solid precipitate. What type of change is this? A) Mechanical change. B) Chemical change. C) Electrical change. D) Physical change. Show Answer Correct Answer: B) Chemical change. 39. Cooking scrambled eggs for breakfast is an example of a ..... A) Physical Property. B) Chemical Change. C) Physical Change. D) Chemical Property. Show Answer Correct Answer: B) Chemical Change. 40. 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. 41. 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. 42. 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. 43. 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. 44. Which is not evidence that a chemical reaction has occured A) Change in temperature or heat. B) Production of flames. C) Production of light. D) Freezing. Show Answer Correct Answer: D) Freezing. 45. 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. 46. 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. 47. 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. 48. 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. 49. 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. 50. 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. 51. Name the substances which are mixed with iron to make stainless steel. A) Copper, gold, silver. B) Carbon, Chromium, Zinc. C) Tin, Nickel, Silver. D) Carbon, Chromium, Nickel. Show Answer Correct Answer: D) Carbon, Chromium, Nickel. 52. Complete the given equation:Carbon dioxide+ ..... $\rightarrow$ Calcium carbonate + Water A) Iron. B) Copper sulphate. C) Sodium chloride. D) Lime water. Show Answer Correct Answer: D) Lime water. 53. Which of these choices is a physical property? A) Flammability. B) Ability to rust. C) Solubility. D) Reaction with water. Show Answer Correct Answer: C) Solubility. 54. The change of matter from a liquid to solid is called ..... A) A. melting. B) B. freezing. C) C. boiling. D) None of the above. Show Answer Correct Answer: B) B. freezing. 55. Which of these describes a physical change in matter? A) Cooking an egg. B) A carton of juice freezing. C) A nail rusting. D) Milk going sour. Show Answer Correct Answer: B) A carton of juice freezing. 56. Toasting a bagel A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical change. 57. What is a key difference between a chemical change and a physical change? A) Physical changes involve energy changes, chemical changes do not. B) Physical changes create new substances, chemical changes do not. C) Chemical changes involve the formation of new substances, physical changes do not. D) Chemical changes are reversible, physical changes are not. Show Answer Correct Answer: C) Chemical changes involve the formation of new substances, physical changes do not. 58. Peristalsis refers to A) The action of the stomach. B) Heart rate increasing. C) One of the digestive organs. D) Smooth muscles moving food through the digestive system. Show Answer Correct Answer: D) Smooth muscles moving food through the digestive system. 59. A change in which a substance undergoes changes in its physical properties is called ..... A) Irreversible change. B) Chemical change. C) Physical change. D) Biological change. Show Answer Correct Answer: C) Physical change. 60. ..... occurs when a solid's particles speed up and the substance changes to a liquid. A) Evaporating. B) Melting. C) Freezing. D) Boiling. Show Answer Correct Answer: B) Melting. ← 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 7Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 8Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books