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 12 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 12 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products? A) The mass changes depending on the reaction. B) The product is half the mass of the reactants. C) The mass is the same. D) The product is doubled. Show Answer Correct Answer: C) The mass is the same. 2. Scenario:Wood burns and turns into ash. Does a chemical or physical change occur? A) Chemical change. B) Change in state. C) Physical change. D) No change occurs. Show Answer Correct Answer: A) Chemical change. 3. Which property is an example of a chemical property? A) The ability to burn. B) The ability to evaporate. C) The ability to dissolve. D) The ability to melt. Show Answer Correct Answer: A) The ability to burn. 4. Which pair of substances when mixed together form a new substance that has different properties than the original substances? A) Vinegar + baking soda. B) Food coloring + milk. C) Salt + water. D) Sugar + water. Show Answer Correct Answer: A) Vinegar + baking soda. 5. When particles at the surface of a liquid move upward and turn into gas, ..... occurs. A) Freezing. B) Melting. C) Evaporation. D) Boiling. Show Answer Correct Answer: C) Evaporation. 6. What kind of change results in a new substance? A) Chemical change. B) Physical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical change. 7. What stays the same when there is a physical change? A) Density. B) Volume. C) Neither. D) None of the above. Show Answer Correct Answer: B) Volume. 8. The process of depositing a thin layer of zinc on iron objects is called ..... A) Galvanization. B) Crystallization. C) Painting. D) None of the above. Show Answer Correct Answer: A) Galvanization. 9. "Adding salt to water changes the taste of water." Which of the following statements is true regarding this change? A) It is a physical change because there is a slight change in colour. B) It is a physical change because the original substance can be recovered. C) It is a chemical change because the salt cannot be recovered. D) It is a chemical change because a new substance is formed. Show Answer Correct Answer: B) It is a physical change because the original substance can be recovered. 10. How many states of matter can be observed in everyday life? A) 3. B) 1. C) 2. D) 4. Show Answer Correct Answer: A) 3. 11. Glass tumbler breaking into pieces is a A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical change. 12. Which would most likely cause a substance to melt? A) Increase in mass. B) Removal of heat. C) Decrease in mass. D) Addition of heat. Show Answer Correct Answer: D) Addition of heat. 13. The sugar in my lemonade seems to disappear when I stir it. This is called ..... A) Solubility. B) Solid. C) Mixture. D) None of the above. Show Answer Correct Answer: A) Solubility. 14. Water condenses on the side of your glass of cold lemonade. A) Endothermic. B) Exothermic. C) All the above. D) None of the above. Show Answer Correct Answer: B) Exothermic. 15. Elements combine in fixed ratio based on their ..... to form compounds. A) Valencies. B) Atom. C) All the above. D) None of the above. Show Answer Correct Answer: A) Valencies. 16. Your car burns gasoline as you drive from home to school A) Endothermic. B) Exothermic. C) All the above. D) None of the above. Show Answer Correct Answer: B) Exothermic. 17. What happens to the mass of a substance during a physical change? A) The mass of a substance remains constant. B) The mass of a substance increases. C) The mass of a substance becomes zero. D) The mass of a substance decreases. Show Answer Correct Answer: A) The mass of a substance remains constant. 18. Which of the following is NOT evidence of a chemical change? A) The temperature changes. B) A state of matter change happens. C) A precipitate forms. D) A gas forms. Show Answer Correct Answer: B) A state of matter change happens. 19. What happens to the particles during a physical change? A) The particles change into a different element during a physical change. B) The particles do not change their identity or composition during a physical change. C) The particles lose mass during a physical change. D) The particles become radioactive during a physical change. Show Answer Correct Answer: B) The particles do not change their identity or composition during a physical change. 20. Adding ..... to water will result in a chemical change A) Oil. B) Salt. C) An antacid tablet. D) Sugar. Show Answer Correct Answer: C) An antacid tablet. 21. A house mad of toy blocks is weighed. It is taken apart and each block weighed separately. If the weight of all the blocks is added, what will it total? A) The amount of 10 toy blocks. B) The same as the house. C) A little more than the weight of the house. D) A little less than the weight of the house. Show Answer Correct Answer: B) The same as the house. 22. Which process is a physical change? A) Rusting iron. B) Baking a cake. C) Boiling water. D) Burning paper. Show Answer Correct Answer: C) Boiling water. 23. Blow drying my hair is an example of a physical change. What is the evidence of this? A) Color Change. B) State Change. C) Fire. D) New substance. Show Answer Correct Answer: B) State Change. 24. In chemical and physical changes, mass is not created or destroyed but is only transformed into different substances. A) Chemical change. B) Physical change. C) Physical property. D) Law of conservation of mass. Show Answer Correct Answer: D) Law of conservation of mass. 25. Which of the following is NOT a clue that a chemical change has occurred? A) Color change. B) Change of state of matter. C) Production of a gas. D) Production of heat. Show Answer Correct Answer: B) Change of state of matter. 26. According to the law of conservation of matter, which statement about chemical reactions is true? A) Energy is created as atoms are destroyed in chemical reactions. B) Atoms cannot be created or destroyed by chemical reactions. C) Every atom destroyed in a chemical reaction must be replaced. D) Atoms are created by some reactions and destroyed by others. Show Answer Correct Answer: B) Atoms cannot be created or destroyed by chemical reactions. 27. A substance with a definite shape and volume is a ..... A) Solid. B) Liquid. C) Gas. D) None of the above. Show Answer Correct Answer: A) Solid. 28. A change in size, shape, or state of matter that does not change into a new kind of matter is a A) Physical change. B) Reactant. C) Chemical change. D) Product. Show Answer Correct Answer: A) Physical change. 29. Water freezes at 0$^\circ$C A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical change. 30. The best way to separate a mixture of peas and sand is by A) Evaporation. B) Burn it. C) Use a magnet. D) Using a strainer. Show Answer Correct Answer: D) Using a strainer. 31. Define physical change A) A change that changes only the physical traits of the substance, without making any change in their internal structure. B) A change that changes by affecting the internal structure of the substance to form a new substance. C) All the above. D) None of the above. Show Answer Correct Answer: A) A change that changes only the physical traits of the substance, without making any change in their internal structure. 32. What are the evidences of a chemical change? A) Change in volume. B) Change in texture. C) Formation of a precipitate, change in color, release of gas, and absorption or release of heat. D) Change in state of matter. Show Answer Correct Answer: C) Formation of a precipitate, change in color, release of gas, and absorption or release of heat. 33. Identify the chemical change from the following: A) Melting of ice. B) Digestion of food. C) Tearing of paper. D) Melting of wax. Show Answer Correct Answer: B) Digestion of food. 34. Which is evidence a chemical change is taking place? A) The item changes shape. B) The item changes sizes. C) The item melts. D) Smoke is produced. Show Answer Correct Answer: D) Smoke is produced. 35. Which is NOT a physical change? A) Cutting a pizza into equal slices. B) Baking cupcakes. C) Ice cubes melting back into liquid. water. D) A chocolate bar melting. Show Answer Correct Answer: B) Baking cupcakes. 36. The esophagus goes through a process knows as peristalsis which transports food from the mouth to the stomach. Is peristalsis an example of physical or chemical change in digestion? A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical change. 37. Sodium Hydroxide dissolves in water A) Chemical Change. B) Physical Change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical Change. 38. Caroline left an ice cube on the kitchen counter. An hour later, she notices that the ice has changed.What evidence would Caroline have observed that shows a physical change has occurred? A) The ice melted to form a liquid. B) The ice melted to form a solid. C) The ice is now colder. D) The ice is now clear. Show Answer Correct Answer: A) The ice melted to form a liquid. 39. Which of the following is evidence of a chemical reaction? A) Paper being cut in half. B) Fizzing. C) Saltwater. D) Water changing to ice. Show Answer Correct Answer: B) Fizzing. 40. This changes the matter into something completely different. A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical change. 41. Bubbles form because heat is removed, causing themolecules to move quickly as the water boils. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 42. Water freezes on the pavement and the roads become icy. A) Endothermic. B) Exothermic. C) All the above. D) None of the above. Show Answer Correct Answer: B) Exothermic. 43. The luster or shine of a metal is an example of a ..... A) Chemical Property. B) Physical Property. C) Physical Change. D) Chemical Change. Show Answer Correct Answer: B) Physical Property. 44. Which of the following atomic symbols is written correctly? A) Of. B) HE. C) C. D) CL. Show Answer Correct Answer: C) C. 45. What is shredding paper A) Chemical change. B) Physical change. C) Neither. D) None of the above. Show Answer Correct Answer: B) Physical change. 46. Which of the following is a characteristic of a physical change? A) Release of gas. B) Change in state. C) Formation of a new substance. D) A change in color. Show Answer Correct Answer: B) Change in state. 47. Jesse lost his favorite ball. He described it as white and bumpy. What two physical properties did Jesse use in this part of his description? A) Size and volume. B) Shape and texture. C) Mass and size. D) Color and texture. Show Answer Correct Answer: D) Color and texture. 48. A naturally occurring chemical substance that combines with other amino acids to make protein A) Reactant. B) Product. C) Activation energy. D) Amino acid. Show Answer Correct Answer: D) Amino acid. 49. Which of the following is an example of a reversible change? A) Burning of paper. B) Freezing of water. C) Decomposition of food. D) Rusting of iron. Show Answer Correct Answer: B) Freezing of water. 50. Water vapor ..... into liquid water when temperatures drop below 100 C. Think of your cup of sweet tea at the family reunion. A) Condenses. B) Solidifies. C) Freezes. D) None of the above. Show Answer Correct Answer: A) Condenses. 51. Select which answers are evidence of a chemical changes:A)Heat is added to the powder.B) The powder changes to a liquid.C) A gummy bear is added to the liquid.D) A flame forms inside the test tube.E)Smoke is produced.F) The solution changes from clear to black. A) D, E, F. B) B, C, F. C) A, B, D. D) A, D, F. Show Answer Correct Answer: A) D, E, F. 52. The acid released in the stomach to break down food is a A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical change. 53. A student mixes two clear liquids and finds that they turn blue when combined. What type of change did the student observe? A) Change in texture. B) Change in size. C) Change in color. D) Change in shape. Show Answer Correct Answer: C) Change in color. 54. Properties such as shape, size and state of a substance are called it's ..... A) Physical properties. B) Chemical properties. C) None of the above. D) None of the above. Show Answer Correct Answer: A) Physical properties. 55. Which of the following is an example of a chemical reaction? A) A marshmallow turning black when heated over a fire. B) A powder dissolving in water to make lemonade. C) An ice cube melting into a puddle of water. D) Salt crystals being crushed into a powder. Show Answer Correct Answer: A) A marshmallow turning black when heated over a fire. 56. Anaerobic bacteria digest the animal waste and produce biogas (Change A). The gas is burnt as fuel (Change B). The following statements pertain to these changes. Choose the correct one. A) Process A-Physical Change. B) Process B-Chemical change. C) Both process A and B are chemical changes. D) Both process A and B are physical change. Show Answer Correct Answer: C) Both process A and B are chemical changes. 57. A banana turning brown is a A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical change. 58. A solution in which no more solute can be dissolved at a particular temperature is called: A) Saturated solution. B) Unsaturated solution. C) Impure solution. D) Sugar solution. Show Answer Correct Answer: A) Saturated solution. 59. Burning always indicates a A) Physical change. B) Chemical change. C) Periodic change. D) Both physical and chemical change. Show Answer Correct Answer: B) Chemical change. 60. Which of the following is a chemical change that occurs to the food? A) The reduction in size of food particles as food is churned. B) The movement of food to the stomach after food is swallowed. C) The breakdown of molecules of food by enzymes and acid in the stomach. D) Teeth tear and crush food into smaller pieces. E) None of the above. Show Answer Correct Answer: C) The breakdown of molecules of food by enzymes and acid in the stomach. ← 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