This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 5 Physical And Chemical Changes – Quiz 31 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 31 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 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. 2. 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. 3. The luster or shine of a metal is an example of a ..... A) Physical Property. B) Physical Change. C) Chemical Property. D) Chemical Change. Show Answer Correct Answer: A) Physical Property. 4. Which of the following atomic symbols is written correctly? A) Of. B) HE. C) C. D) CL. Show Answer Correct Answer: C) C. 5. What is shredding paper A) Chemical change. B) Physical change. C) Neither. D) None of the above. Show Answer Correct Answer: B) Physical change. 6. Which of the following is a characteristic of a physical change? A) A change in color. B) Formation of a new substance. C) Change in state. D) Release of gas. Show Answer Correct Answer: C) Change in state. 7. 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. 8. A naturally occurring chemical substance that combines with other amino acids to make protein A) Amino acid. B) Activation energy. C) Reactant. D) Product. Show Answer Correct Answer: A) Amino acid. 9. Which of the following is an example of a reversible change? A) Freezing of water. B) Burning of paper. C) Rusting of iron. D) Decomposition of food. Show Answer Correct Answer: A) Freezing of water. 10. 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. 11. 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) B, C, F. B) A, D, F. C) D, E, F. D) A, B, D. Show Answer Correct Answer: C) D, E, F. 12. 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. 13. 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 color. B) Change in shape. C) Change in size. D) Change in texture. Show Answer Correct Answer: A) Change in color. 14. 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. 15. 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. 16. 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. 17. 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. 18. A solution in which no more solute can be dissolved at a particular temperature is called: A) Saturated solution. B) Unsaturated solution. C) Sugar solution. D) Impure solution. Show Answer Correct Answer: A) Saturated solution. 19. 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. 20. 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. 21. A piece of paper burns. A) Physical Change. B) Chemical Change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical Change. 22. Molecules in a solid move A) Very fast. B) Fast. C) Very slow. D) None of the above. Show Answer Correct Answer: C) Very slow. 23. Browning of an apple after it is cut is an example of ..... A) Physical change. B) Chemical change. C) Reversible change. D) Biological change. Show Answer Correct Answer: B) Chemical change. 24. Which one describes a physical change? A) A change where the chemical makeup of an object changes. B) A change where the characteristics do not change the substance. C) A change where the substance turns into something new. D) The composition of the object changes. Show Answer Correct Answer: B) A change where the characteristics do not change the substance. 25. Painting a piece of wood A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical change. ← PreviousNext →Related 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 8Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 9Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books