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 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Describe the process of rusting. A) Rusting is the process of iron or steel reacting with oxygen and water to form iron oxide, also known as rust. B) Rusting is the process of copper reacting with oxygen and water to form copper oxide. C) Rusting is the process of iron or steel reacting with carbon dioxide and water to form iron oxide. D) Rusting is the process of aluminum reacting with oxygen and water to form aluminum oxide. Show Answer Correct Answer: A) Rusting is the process of iron or steel reacting with oxygen and water to form iron oxide, also known as rust. 2. Which of the following can be signs that a chemical change has occurred? A) Color change. B) Formation of a gas (bubbles). C) Energy change. D) All of the above. Show Answer Correct Answer: D) All of the above. 3. Which of the following DOES NOT indicate a chemical change/reaction is occurring? A) Formation of a Precipitate. B) Formation of gas/bubbles. C) State of matter change. D) Color Change. Show Answer Correct Answer: C) State of matter change. 4. A 2 liter of Sprite weighs about A) 200 g. B) 2 kg. C) 2 g. D) 20 g. Show Answer Correct Answer: B) 2 kg. 5. Explain the concept of rusting in terms of physical and chemical changes. A) Rusting is a reversible process with no permanent change to the iron. B) Rusting involves both physical changes, such as the appearance of rust, and chemical changes, as iron reacts with oxygen and water to form iron oxide. C) Rusting is a result of iron reacting with carbon dioxide instead of oxygen and water. D) Rusting is only a physical change with no chemical reactions involved. Show Answer Correct Answer: B) Rusting involves both physical changes, such as the appearance of rust, and chemical changes, as iron reacts with oxygen and water to form iron oxide. 6. What is the chemical nature of the product in the given equation:Magnesium oxide+ Water$\rightarrow$ Magnesium hydroxide A) Acidic. B) Basic. C) Neutral. D) None of the above. Show Answer Correct Answer: B) Basic. 7. Mr. Sauls mixed 2 substances together. What is the best evidence that a CHEMICAL change occurred when he mixed both substances? A) The substance changed in density, volume, or mass. B) The substance changed in color. C) The substance is a liquid. D) None of the above. Show Answer Correct Answer: B) The substance changed in color. 8. Silver is a white metal that is an excellent conductor. Silver tarnishes when exposed to air and light. The density of silver is 10.49 g/cm$^{3}$ The melting point is 962$^{o}$C and the boiling point is 2000$^{o}$C. A chemical property of silver is A) Melting point. B) Boiling point. C) Density. D) Tarnishing. Show Answer Correct Answer: D) Tarnishing. 9. During an experiment, a student observes a color change and gas production. What type of change is most likely occurring? A) Chemical change. B) Nuclear change. C) Physical change. D) No change. Show Answer Correct Answer: A) Chemical change. 10. Which of the following is an example that includes evidence of a chemical change? A) Water is boiled and turns to gas. B) A solid block is ice is heated, and it completely melts into a liquid. C) An iron nail that turns rusty. D) A sample of mineral is broken down into smaller pieces. Show Answer Correct Answer: C) An iron nail that turns rusty. 11. When an object has the ability to be stretched into a thin wire this is A) Density. B) Dirtability. C) Dissovility. D) Ductility. Show Answer Correct Answer: D) Ductility. 12. Which of the following is a chemical property of water? A) Reacts with pure sodium. B) Dissolves sugar easily. C) Has a density of 1 gm/mL. D) Boils at 100 $^{o}$C. Show Answer Correct Answer: A) Reacts with pure sodium. 13. Which one is not an indicator of a chemical change A) Change of colour. B) Formation of a solid. C) Formation of gas. D) Change in temperature. E) Formation of liquid. Show Answer Correct Answer: E) Formation of liquid. 14. Which of the following is a negatively charged subatomic particle? A) Quark. B) Proton. C) Electron. D) Neutron. Show Answer Correct Answer: C) Electron. 15. The difference between a Physical change and a Chemical change is ..... A) Physical change is only a change to the outside appearance. B) Chemical change is when matter is changed into something new. C) Atoms are rearranged in chemical changes & not in physical. D) All are correct. Show Answer Correct Answer: D) All are correct. 16. Why is rusting considered a chemical change? A) It involves a change in state. B) It can be easily reversed. C) It results in the formation of a new substance. D) It involves a change in temperature. Show Answer Correct Answer: C) It results in the formation of a new substance. 17. How does thermal energy move? A) Cold to warmer objects. B) Warmer to cooler objects. C) Solids to liquids. D) None of the above. Show Answer Correct Answer: B) Warmer to cooler objects. 18. Is a car getting rusty a A) Chemical Change. B) Physical Physical. C) Both. D) Neither. Show Answer Correct Answer: A) Chemical Change. 19. You put a shallow glass of water with a 10 tablespoon of salt in the hot, summer sun. After 30 days, you return to find what in the cup? A) Only salt. B) Only water because the salt dissolved into the water. C) Nothing was left in the cup. D) None of the above. Show Answer Correct Answer: A) Only salt. 20. A man painted his main gate made up of iron, to A) (i) prevent it from rusting. B) (ii) protect it from sun. Physical and Chemical. C) (iii) make it look beautiful. D) (iv) make it dust free. Show Answer Correct Answer: A) (i) prevent it from rusting. 21. Melting and boiling point are ..... properties of a substance. A) Chemical. B) Structural. C) External. D) Physical. Show Answer Correct Answer: D) Physical. 22. Dissolving sugar in your coffee is a ..... change. A) Chemical change. B) Physical change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical change. 23. Two items are combined inside a balloon. The balloon is tied shut. What observation would indicate that mixing the chemicals produced a gas? A) The balloon can hold a liquid. B) The balloon increases in volume. C) The balloon becomes cold. D) The balloon was tied shut. Show Answer Correct Answer: B) The balloon increases in volume. 24. A change in the color of a substance is A) A physical change. B) A change to a chemical property. C) Not important to observe. D) An indication of a chemical change. Show Answer Correct Answer: D) An indication of a chemical change. 25. A teacher is demonstrating physical and chemical changes to her class. Which action should she use to demonstrate a chemical change? A) Burning a piece of paper. B) Folding a piece of paper. C) Tearing a piece of paper. D) Cutting a piece of paper. Show Answer Correct Answer: A) Burning a piece of paper. 26. When you make a paper airplane from a sheet of paper, which physical property did you change A) Shape. B) Mass. C) Color. D) Density. Show Answer Correct Answer: A) Shape. 27. The amount of matter in an object A) Volume. B) Mass. C) Matter. D) Density. Show Answer Correct Answer: B) Mass. 28. When two liquids are mixed, the container feels cold to the touch. This is evidence of what? A) Physical change. B) Chemical change. C) State of matter change. D) No change. Show Answer Correct Answer: B) Chemical change. 29. If the chemical properties of a substance remain unchanged & the appearance or shape of an substance changes it is a ..... A) Chemical Change. B) Physical Change. C) Both a physical and chemical change. D) Neither a physical or chemical change. Show Answer Correct Answer: B) Physical Change. 30. What is the left part of a chemical equation called?H$_{2 + }$O $\rightarrow$ H$_{2}$O A) Yields. B) Products. C) Chemical Equation. D) Reactants. Show Answer Correct Answer: D) Reactants. 31. Water condensing A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical. 32. A solid is heated during an investigation causing it to melt. Which of the following most likely occurred? A) A chemical change. B) A physical change. C) A new substance was formed. D) A compound was broken down. E) A compound was formed. Show Answer Correct Answer: B) A physical change. 33. Chopping vegetables is a A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical change. 34. Melting of wax is A) A reversible chemical change. B) An irreversible physical change. C) An irreversible chemical change. D) A reversible physical change. Show Answer Correct Answer: D) A reversible physical change. 35. When you eat food, you turn ..... into ..... A) Thermal energy, chemical energy. B) Chemical energy, thermal energy. C) Kinetic energy, potential energy. D) Thermal energy, potential energy. Show Answer Correct Answer: B) Chemical energy, thermal energy. 36. Production of heat or light is evidence that a chemical change may have occurred. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 37. Sawing of wood is A) Physical change and reversible. B) Physical change and Irreversible. C) Chemical change and reversible. D) Chemical change and irreversible. Show Answer Correct Answer: B) Physical change and Irreversible. 38. Leo keeps a bowl of water in the freezer for a few hours to obtain substance X. He then leaves a second bowl of water on the table for an hour to obtain substance Y.Which statement correctly describes substances X and Y? A) X and Y both are solids. B) X and Y both are liquids. C) X is a liquid, and Y is a solid. D) X is a solid, and Y is a liquid. Show Answer Correct Answer: D) X is a solid, and Y is a liquid. 39. A physical property can be observed with your A) Eyes. B) Ears. C) Tastes. D) All of the above. Show Answer Correct Answer: D) All of the above. 40. Is a change in temperature a chemical or physical change? A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical. 41. Thermal energy (heat) is released or absorbed during the reaction explains the ..... A) Change in color. B) Change in temperature. C) Change in gas. D) None of the above. Show Answer Correct Answer: B) Change in temperature. 42. Which of the following examples provides evidence of a PHYSICAL change? A) Wood is burned and releases ash and smoke. B) Iron rusts over time. C) When mixed, baking soda and vinegar form gas bubbles. D) A piece of paper changes shape when you rip it up. Show Answer Correct Answer: D) A piece of paper changes shape when you rip it up. 43. Which type of change is most often easily reversed? A) Chemical. B) Physical. C) Both a physical and chemical change. D) Neither a physical or chemical change. Show Answer Correct Answer: B) Physical. 44. What is the color change observed during a chemical change called? A) Chemical reaction. B) Color transformation. C) Chemical transformation. D) Color alteration. Show Answer Correct Answer: A) Chemical reaction. 45. Condition in which matter exists. A) Mass. B) Conditions of Matter. C) Matter. D) States of Matter. Show Answer Correct Answer: D) States of Matter. 46. Shredding paper is an example of a A) Chemical change. B) Chemical property. C) Physical change. D) Physical property. Show Answer Correct Answer: C) Physical change. 47. The smell of coffee is an example of a ..... A) Chemical Property. B) Physical Property. C) Chemical Change. D) Physical Change. Show Answer Correct Answer: B) Physical Property. 48. Ice melting is chemical A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 49. The chemical properties of paper are changed when which of the following is done to it? A) Folding. B) Cutting. C) Tearing. D) Burning. Show Answer Correct Answer: D) Burning. 50. A 500-gram block of solid cheese is melted in a pot. Which is most likely the mass of the cheese after it is melted? A) 500 grams, because the cheese does not gain or lose mass just because it was melted. B) 499 grams, because some of the cheese evaporates as it melts. C) 502 grams, because the cheese absorbs heat as it melts. D) None of the above. Show Answer Correct Answer: A) 500 grams, because the cheese does not gain or lose mass just because it was melted. 51. When placed in H$_{2}$0, a sodium pellet catches on fire as hydrogen gas is liberated and sodium hydroxide forms. A) Chemical Change. B) Physical Change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical Change. 52. An example of a liquid changing to a gas is A) Paper tearing. B) A lake freezing in the winter. C) A pot of boiling water. D) Wood burning. Show Answer Correct Answer: C) A pot of boiling water. 53. Which of the following is NOT an example of chemical change? A) Sour milk. B) Breaking a pencil. C) Rust. D) Burning wood. Show Answer Correct Answer: B) Breaking a pencil. 54. A chemical reaction in which substances combine rapidly with oxygen to produce light and heat A) Activation energy. B) Amino acid. C) Combustion. D) Reactant. Show Answer Correct Answer: C) Combustion. 55. While making a spade, an iron blade is fitted to the wooden handle: A) By heating then cooling. B) By melting then cooling. C) By cooling then heating. D) By freezing. Show Answer Correct Answer: A) By heating then cooling. 56. If enough heat is taken away from a container of water, what will happen to the water? A) It will turn into a gas. B) It will increase in weight. C) It will begin to boil. D) It will become a solid. Show Answer Correct Answer: D) It will become a solid. 57. A change in matter that produces new kinds of matter with different properties is a A) Product. B) Chemical change. C) Solution. D) Physical change. Show Answer Correct Answer: B) Chemical change. 58. Which of the following is an example of a chemical change? A) Melting chocolate. B) Wood burning. C) Crushing a soda can. D) Cutting paper. Show Answer Correct Answer: B) Wood burning. 59. Baking a cake for your friends birthday is an example of a ..... A) Chemical Change. B) Physical Change. C) Physical Property. D) Chemical Property. Show Answer Correct Answer: A) Chemical Change. 60. If you break a piece of glass, the shape of the glass changes, but the properties in the fragments remain the same. Which of the following has occurred? A) A phase change. B) A physical change. C) A chemical change. D) A temperature change. Show Answer Correct Answer: B) A physical change. Next →Related QuizzesScience QuizzesClass 7 QuizzesClass 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books