This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 5 Physical And Chemical Changes – Quiz 13 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 13 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. During chemical digestion A) Only changes in size and shape occur. B) Food is chemically changed by acid, bases and enzymes. C) All the above. D) None of the above. Show Answer Correct Answer: B) Food is chemically changed by acid, bases and enzymes. 2. A nail rusts. A) Physical Change. B) Chemical Change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical Change. 3. Plants absorb sunlight during photosynthesis. Hence the process is A) Exothermic. B) Endothermic. C) Physical change. D) None of the above. Show Answer Correct Answer: B) Endothermic. 4. Which of the following tells you that a chemical change has occurred? A) Change Shape. B) Melting. C) Vaporizing. D) Change in color. Show Answer Correct Answer: D) Change in color. 5. In a chemical reaction, the number of atoms in the reactants and the products ..... A) Must be the same. B) Must be different. C) All the above. D) None of the above. Show Answer Correct Answer: A) Must be the same. 6. Why is a mixture a physical change? A) It creates a new substance. B) It has multiple ingredients. C) It can be separated. D) None of the above. Show Answer Correct Answer: C) It can be separated. 7. A solid piece of chocolate is melted and changed to liquid form. Which property of the piece of chocolate will remain the same? A) Texture. B) Temperature. C) Shape. D) Mass. Show Answer Correct Answer: D) Mass. 8. In addition to new products, the following may accompany a chemical change: A) Production of sound. B) Change in temperature. C) Release of a gas. D) All of the above. Show Answer Correct Answer: D) All of the above. 9. State of matter with a fixed shape and volume, molecules are very close together. A) Solid. B) Liquid. C) Gas. D) Plasma. Show Answer Correct Answer: A) Solid. 10. Which of the following would be a physical change? A) Slicing bread. B) Baking bread. C) Baking a cake. D) Rotting food. Show Answer Correct Answer: A) Slicing bread. 11. Name the metals involved in making stainless steel. A) Chromium, nickel and manganese. B) Elements, atoms, componds. C) Molecules. D) None of the above. Show Answer Correct Answer: A) Chromium, nickel and manganese. 12. If you put your skittle candy on a plate with water the color will come off. What type of change is this? A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical. 13. TRUE OR FALSE:You can look at matter and observe the chemical properties. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. 14. Name the gas which turn lime water into milky A) Hydrogen. B) Nitrogen. C) Oxygen. D) Carbon dioxide. Show Answer Correct Answer: D) Carbon dioxide. 15. Will you weigh the same, more or less on the Moon? A) Less. B) More. C) Same. D) None of the above. Show Answer Correct Answer: A) Less. 16. When an iron bar rusts in the rain why is this a chemical change A) A new substance forms, rust, on the iron. B) Nothing happens. C) The iron turns into water. D) The iron becomes salt. Show Answer Correct Answer: A) A new substance forms, rust, on the iron. 17. Provide an example of a chemical change. A) Burning of wood. B) Mixing salt and water. C) Melting ice. D) Boiling water. Show Answer Correct Answer: A) Burning of wood. 18. Bread molding A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical. 19. Chemical changes can be easily reversed by physical changes. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 20. Flammability (burns):Chemical or Physical Property A) Chemical Property. B) Physical Property. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical Property. 21. A rotting pumpkin A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical change. 22. What is change of matter from a gas to a liquid. A) A. evaporation. B) B. condensation. C) C. freezing. D) None of the above. Show Answer Correct Answer: B) B. condensation. 23. Which of the following options provides evidence of a CHEMICAL change? A) Wood is burned releasing ash and smoke. B) Rocks separate when soil is sifted. C) Water turns to ice when you put it in the freezer. D) Salt dissolves in water. Show Answer Correct Answer: A) Wood is burned releasing ash and smoke. 24. An attractive force for some metals. A) Conductivity. B) Solubility. C) Magnetism. D) Mass. Show Answer Correct Answer: C) Magnetism. 25. 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. ← 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