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 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 4 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Properties that can be measured or observed only when matter undergoes a change to become an entirely different kind of matter. A) Density. B) Physical Properties Of Matter. C) Evaporation. D) Chemical Properties of Matter. Show Answer Correct Answer: D) Chemical Properties of Matter. 2. Scenario:Ice melts into water when heated. Does a chemical or physical change occur? A) Chemical change. B) Emotional change. C) Physical change. D) Biological change. Show Answer Correct Answer: C) Physical change. 3. Reactivity of a subject is a ..... change. A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical. 4. A chemical change ..... the identity of the substance. A) Changes. B) Maintains. C) All the above. D) None of the above. Show Answer Correct Answer: A) Changes. 5. Which of these is NOT a sign of a chemical reaction? A) A temperature change. B) A color change. C) A phase change. D) Formation of a precipitate. Show Answer Correct Answer: C) A phase change. 6. Is a change in size evidence for a physical or chemical change? A) Physical Change. B) Chemical Change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical Change. 7. What kind of energy is food? A) Thermal energy. B) Solar energy. C) Mechanical energy. D) Chemical energy. Show Answer Correct Answer: D) Chemical energy. 8. You sharpen a pencil. A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical change. 9. A student observes some sugar as it is heated and burns. The student concludes that a chemical reaction has occurred. Which of the following observations about the burning sugar provides evidence of a chemical reaction? A) Heat is added to the sugar crystals. B) The sugar melts and becomes a liquid. C) Gas is produced as the sugar turns black. D) No evidence of chemical reaction is present. Show Answer Correct Answer: C) Gas is produced as the sugar turns black. 10. A characteristic that you can observe directly or measure with a tool such as mass, size, shape, color, texture, and volume A) Chemical change. B) Physical change. C) Physical property. D) Chemical property. Show Answer Correct Answer: C) Physical property. 11. Breaking food down with the use of enzymes is known as: A) Chemical Digestion. B) Physical Digestion. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical Digestion. 12. If a glass beaker hits the floor and breaks, what should you do? A) Run around yelling that something has broken. B) Clean up the glass yourself. C) Put your hand up and ask for the teachers assistance. D) None of the above. Show Answer Correct Answer: C) Put your hand up and ask for the teachers assistance. 13. Which action would cause the weight of an object or substance to decrease? A) Burning it. B) Freezing it. C) Stirring it. D) Dissolving it. Show Answer Correct Answer: A) Burning it. 14. Which is NOT evidence of a chemical change? A) Temperature change. B) Gas produced. C) Melting. D) Unexpected color change. Show Answer Correct Answer: C) Melting. 15. What does a chemical change result in? A) A change in the way atoms are bonded to each other. B) A change in state of the substance (ex. liquid to solid). C) A change in texture of the substance. D) A change in the appearance of the substance. Show Answer Correct Answer: A) A change in the way atoms are bonded to each other. 16. An element is a substance that cannot be split into simpler substances by chemical methods. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 17. Cyanides' toxicity is an example of a ..... A) Physical Change. B) Physical Property. C) Chemical Change. D) Chemical Property. Show Answer Correct Answer: D) Chemical Property. 18. Mark is observing a burning candle. He notices the melted wax drips down the side of the candle and hardens again. The candle has ..... A) Formed a new substance. B) Undergone a physical change. C) Undergone a chemical change. D) Undergone a physical and chemical change. Show Answer Correct Answer: B) Undergone a physical change. 19. When one substance reacts with another it is a ..... change. A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical. 20. Fireworks Exploding are a ..... change. A) Physical Change. B) Chemical Change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical Change. 21. The amount of matter in something is A) Dissolve. B) Solubility. C) Matter. D) Mass. Show Answer Correct Answer: D) Mass. 22. Which of these scientific tools is essential for testing the Law of Conservation of matter? A) Metric Ruler. B) Graduated Cylinder. C) Balance. D) Spring Scale. Show Answer Correct Answer: C) Balance. 23. ..... is an example of both a color change and new substance produced from a chemical change with oxygen and metal. A) Rust (iron oxide). B) Wood chips. C) Shredded paper. D) Melted wax. Show Answer Correct Answer: A) Rust (iron oxide). 24. What can you infer about the changes that formed the Grand Canyon? A) They were molecular changes. B) They were physical changes. C) They were chemical changes. D) They were changes in weather. Show Answer Correct Answer: B) They were physical changes. 25. Which is an example of an element found in nature? A) Gold. B) Glass. C) Beef. D) Cars. Show Answer Correct Answer: A) Gold. 26. Cutting a slice of bread from a loaf A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical change. 27. What happens in a chemical change? A) The atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed. B) When objects or substances undergo a change that does not change into a different substance. C) All the above. D) None of the above. Show Answer Correct Answer: A) The atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed. 28. During digestion, which of the following is an example of a physical change? A) Enzymes breaking down proteins into amino acids. B) Teeth grinding food into smaller pieces. C) Stomach acid breaking down food. D) Bacteria fermenting fiber in the colon. Show Answer Correct Answer: B) Teeth grinding food into smaller pieces. 29. What characteristic defines all chemical changes? A) A new material is formed. B) Electricity is produced. C) Bubbles are produced. D) There is a change of state. Show Answer Correct Answer: A) A new material is formed. 30. How many different elements are in C$_{6}$H$_{12}$O$_{22}$ A) 12. B) 22. C) Three. D) 6. Show Answer Correct Answer: C) Three. 31. Tearing a piece of paper into pieces A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical change. 32. The gas that we use in the kitchen is liquefied petroleum gas (LPG). In a cylinder, it exists as a liquid. When it is released from the cylinder it becomes a gas (Change A), and then it burns (Change B). Which of the following is true? A) Process A is a Physical Change. B) Process B is a Chemical change. C) Both processes A and B are chemical changes. D) Both (a) and (b) are True. Show Answer Correct Answer: D) Both (a) and (b) are True. 33. The weight of a pencil is about A) 5 kg. B) 50 g. C) 500 g. D) 5 g. Show Answer Correct Answer: D) 5 g. 34. How do we know a mixture of flour and rice is only a physical change? A) It will release a new power into the air. B) The mixture will give off a new smell. C) The flour and rice can be sifted so it becomes separate again. D) If you add water to it the mixture becomes sticky. Show Answer Correct Answer: C) The flour and rice can be sifted so it becomes separate again. 35. When carbon dioxide is passed through lime water, it turns milky due to the formation of ..... A) Carbon dioxide. B) Vinegar. C) Calcium carbonate. D) Copper sulphate. Show Answer Correct Answer: C) Calcium carbonate. 36. What happens to temperature as water freezes? A) The temperature increases. B) The temperature decreases. C) The temperature stays the same. D) None of the above. Show Answer Correct Answer: C) The temperature stays the same. 37. Baking soda and vinegar mixed together produce a gas. A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical change. 38. When did a chemical change occur? A) Nail 1 was put in the oven. B) Nail is cut into equal parts. C) Nails sits outside and turns red. D) Nail was bent into a different shape. Show Answer Correct Answer: C) Nails sits outside and turns red. 39. Define atomic number. A) No. of shells in an atom. B) No. of atoms in an element. C) No. of neutrons in an atom. D) No. of electrons or protons in an atom. Show Answer Correct Answer: D) No. of electrons or protons in an atom. 40. Styrofoam is best for serving hot cocoa and a milkshake because foam is a(an) ..... A) Conductor. B) Insulator. C) All the above. D) None of the above. Show Answer Correct Answer: B) Insulator. 41. Water boiling into steam is a A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical change. 42. Which of the following could indicate a chemical change? A) All of the answers could indicate Chemical Change. B) A color change has occurred. C) Bubbles appear. D) Properties are different after a reaction. Show Answer Correct Answer: A) All of the answers could indicate Chemical Change. 43. Which of the following processes is used to prevent articles from rusting? A) Crystallization. B) Galvanization. C) Evaporation. D) Electolysis. Show Answer Correct Answer: B) Galvanization. 44. I told Ms. Willson I had a salad made of only celery. She gasped and stated it must be a mixture to be a salad. That is an evidence of its ..... A) Chemical Property. B) Mixture. C) Chemical Change. D) Physical Change. Show Answer Correct Answer: D) Physical Change. 45. Matter goes through a change resulting in a different size. What type of change is most likely occurring? A) Physical. B) Bases. C) Chemical. D) Acids. Show Answer Correct Answer: A) Physical. 46. What are the signs of a chemical change? A) Change in texture. B) Change in temperature. C) Change in state. D) Formation of a precipitate, change in color, release of gas, and absorption or release of energy. Show Answer Correct Answer: D) Formation of a precipitate, change in color, release of gas, and absorption or release of energy. 47. The temperature at which liquid water freezes or becomes a solid, 32 degrees Fahrenheit A) Boiling Point. B) Freezing Point. C) Hot Point. D) Ice Point. Show Answer Correct Answer: B) Freezing Point. 48. Why is tearing a sheet of paper into pieces a physical change? A) Tearing of a paper is a physical change because when the paper is torn only the shape and size of the paper is changed, no new substance is formed. B) Tearing of a paper is a physical change because when the paper is torn only the shape and size of the paper does not change and new substance is formed. C) All the above. D) None of the above. Show Answer Correct Answer: A) Tearing of a paper is a physical change because when the paper is torn only the shape and size of the paper is changed, no new substance is formed. 49. A chemical change is also called a A) Chemical reaction. B) Rusting. C) Both chemical reaction and rusting. D) All of these. Show Answer Correct Answer: A) Chemical reaction. 50. Two clear liquids are mixed together. When mixed the two liquids bubble and turn blue. You just witnessed a A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical change. 51. Bursting of firecrackers is an example of ..... While Drying of clothes is an example of ..... A) Desirable and Undesirable. B) Physical, Chemical. C) Chemical, Physical. D) None of these. Show Answer Correct Answer: C) Chemical, Physical. 52. What is not an example physical change A) Burning of candle. B) Cutting of apple. C) Fireworks exploding. D) None of the above. Show Answer Correct Answer: C) Fireworks exploding. 53. Is gas being released a sign of 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. 54. What is the gas form of water called? A) Liquid. B) Water vapor. C) Oxygen. D) Gas. Show Answer Correct Answer: B) Water vapor. 55. What is the definition of chemical change? A) Any change that results in the formation of one (or more) new chemical substance(s). B) Changes affecting the form of a chemical substance, but not its chemical composition. C) Changing of only the appearance of the object. D) Matter cannot be created or destroyed, only change form. Show Answer Correct Answer: A) Any change that results in the formation of one (or more) new chemical substance(s). 56. Which is an example of physical change in digestion? A) Saliva breaking down food. B) Water absorbed in large intestines. C) Acids in the stomach being broken down. D) None of the above. Show Answer Correct Answer: B) Water absorbed in large intestines. 57. When solids become liquids and liquids become gases energy is A) Gained. B) Lost. C) Stays the same. D) None of the above. Show Answer Correct Answer: A) Gained. 58. Melting is the process of a liquid turning to a solid. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 59. A student mixes yellow powder with water. Which observation would prove a CHEMICAL change occurred? A) The powder DISSOLVED in the water. B) The water's TEMPERATURE changed. C) All the above. D) None of the above. Show Answer Correct Answer: B) The water's TEMPERATURE changed. 60. Which of the following describes using a physical change to separate a mixture? A) Burning wood to produce thermal energy to cook food. B) Melting a chocolate bar with almonds to remove the almonds. C) Heating water to be able to dissolve more sugar in it. D) Adding vinegar to baking soda to produce bubbles from a gas. Show Answer Correct Answer: B) Melting a chocolate bar with almonds to remove the almonds. ← 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 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books