This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 5 Physical And Chemical Changes – Quiz 19 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 19 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. If liquid nitrogen is brought to a boil, is this a physical or chemical change? A) Physical. B) Chemical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical. 2. One of the following is not a chemical change. This one is A) Ripening of bananas. B) Souring of milk. C) Decaying of jute bag. D) Drying of cotton cloth. Show Answer Correct Answer: D) Drying of cotton cloth. 3. A change in the shape of an object is an example of ..... A) A chemical change. B) Energy. C) An endothermic change. D) A physical change. Show Answer Correct Answer: D) A physical change. 4. A change where a complex substance breaks down into simpler substances. Example:Baking soda breaks down into water, carbon dioxide, and other substances, when exposed to heat or an acid. A) Chemical change. B) Physical change. C) Decomposition reaction. D) Solubility. Show Answer Correct Answer: C) Decomposition reaction. 5. Chewing and tearing apart food into smaller pieces is ..... A) Physical/mechanical. B) Chemical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical/mechanical. 6. Matter goes through a change resulting in a change in form. What type of change is most likely occurring? A) Chemical. B) Physical. C) Acids. D) Bases. Show Answer Correct Answer: B) Physical. 7. A change from liquid to gas is a: A) Chemical change. B) Mixture. C) Physical change. D) Chemical substance. Show Answer Correct Answer: C) Physical change. 8. Which of these is NOT$^{}$ a sign that a chemical change has occurred? A) A loss of transparency. B) An unexpected color change. C) A temperature change. D) The formation of a precipitate. Show Answer Correct Answer: A) A loss of transparency. 9. Cutting your hair is an example of a ..... change. A) Physical. B) Chemical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical. 10. What happens when water is heated on a stove? A) It starts to freeze and the liquid turns to gas. B) It starts to freeze and the liquid turns to solid. C) It starts to boil and the liquid evaporates to a gas. D) It starts to boil and the liquid starts to condense into a solid. Show Answer Correct Answer: C) It starts to boil and the liquid evaporates to a gas. 11. Which of the following is an example of a chemical change in digestion? A) Enzymes in saliva breaking down food. B) Teeth grinding down a burger. C) Large intestine absorbing water. D) Peristalsis pushing food in the esophagus. Show Answer Correct Answer: A) Enzymes in saliva breaking down food. 12. Which example is not a physical change? A) Separate five bananas from the bunch. B) Peel bananas. C) Cut bananas. D) Bananas turn brown. Show Answer Correct Answer: D) Bananas turn brown. 13. The best way to separate a mixture of water and pepper is by A) Use a magnet. B) Physical change. C) Using a filter. D) Temperature. Show Answer Correct Answer: C) Using a filter. 14. You tear home your homework into little pieces. How much does the homework weigh after you tear it up? A) A little less. B) A little more. C) The same. D) None of the above. Show Answer Correct Answer: C) The same. 15. Which of the following is a sign of a chemical change? A) Ice melting into water. B) A foul smell coming from a mixture. C) A change in the substance's state of matter. D) Water evaporating into steam. Show Answer Correct Answer: B) A foul smell coming from a mixture. 16. What is an example of a chemical change that happens inside your body? A) Food being broken down by enzymes in your stomach. B) Food being broken into small pieces by your teeth. C) Food being moved from your esophagus into your stomach. D) Water being absorbed inside your large intestine. Show Answer Correct Answer: A) Food being broken down by enzymes in your stomach. 17. Which of the digestive process is a both a physical and chemical change. May be more than one answer. A) Chewing and mixing food with saliva. B) Movement of food through peristalsis. C) Reaction of food with hydrochloric acid. D) Interaction of food with bile. Show Answer Correct Answer: A) Chewing and mixing food with saliva. 18. FILL IN THE BLANK:Removing heat from liquid water will cause the movement of the molecules to ..... , forming a ..... A) Decrease; liquid. B) Decrease; solid. C) Increase; liquid. D) Increase; solid. Show Answer Correct Answer: B) Decrease; solid. 19. What is anything that has mass and takes up space? A) Matter. B) Substance. C) Chemistry. D) Property. Show Answer Correct Answer: A) Matter. 20. A melting popsicle is an example of a ..... A) No change. B) Chemical change. C) Physical change. D) Both a chemical and physical change. Show Answer Correct Answer: C) Physical change. 21. Pure salt can be obtained from sea water by the process of: A) Neutralization. B) Boiling. C) Evaporation. D) Evaporation and crystallization. Show Answer Correct Answer: D) Evaporation and crystallization. 22. If enough heat it taken away or removed from a container of water, what will happen to the water? A) It will begin to boil. B) It will turn into a gas. C) It will become a solid. D) It will increase in weight. Show Answer Correct Answer: C) It will become a solid. 23. The particles in a ..... are the farthest apart and move the fastest. A) Gas. B) Solid. C) Banana. D) Liquid. Show Answer Correct Answer: A) Gas. 24. The following are examples of evidence of a chemical reaction ..... A) Ice melting into a liquid. B) Condensation. C) Endothermic reaction. D) Change in color, production of gas bubbles. Show Answer Correct Answer: D) Change in color, production of gas bubbles. 25. Two methods by which rusting of iron can be prevented? A) Painting and galvanisation. B) Painting and washing. C) Galvanisation and washing. D) Washing and cleaning. Show Answer Correct Answer: A) Painting and galvanisation. ← 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