This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 5 Physical And Chemical Changes – Quiz 10 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 10 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 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. 2. The weight of a pencil is about A) 5 g. B) 50 g. C) 500 g. D) 5 kg. Show Answer Correct Answer: A) 5 g. 3. 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. 4. When carbon dioxide is passed through lime water, it turns milky due to the formation of ..... A) Carbon dioxide. B) Copper sulphate. C) Calcium carbonate. D) Vinegar. Show Answer Correct Answer: C) Calcium carbonate. 5. Broken glass A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical change. 6. 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. 7. 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. 8. 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. 9. Define atomic number. A) No. of neutrons in an atom. B) No. of electrons or protons in an atom. C) No. of atoms in an element. D) No. of shells in an atom. Show Answer Correct Answer: B) No. of electrons or protons in an atom. 10. 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. 11. 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. 12. 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. 13. 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. 14. Which of these describes a chemical property of a substance? A) It is colorless. B) It is odorless(has no smell). C) It is a liquid at 20 degrees Celsius. D) It reacts with Oxygen. Show Answer Correct Answer: D) It reacts with Oxygen. 15. 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 Change. B) Physical Change. C) Mixture. D) Chemical Property. Show Answer Correct Answer: B) Physical Change. 16. Matter goes through a change resulting in a different size. What type of change is most likely occurring? A) Chemical. B) Physical. C) Acids. D) Bases. Show Answer Correct Answer: B) Physical. 17. 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. 18. The temperature at which liquid water freezes or becomes a solid, 32 degrees Fahrenheit A) Boiling Point. B) Hot Point. C) Freezing Point. D) Ice Point. Show Answer Correct Answer: C) Freezing Point. 19. Rusting is a A) Physical and reversible change. B) Chemical and reversible change. C) Physical and irreversible change. D) Chemical and irreversible change. Show Answer Correct Answer: D) Chemical and irreversible change. 20. 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. 21. 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. 22. 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. 23. 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. 24. 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. 25. 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. ← 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 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books