This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 5 Physical And Chemical Changes – Quiz 36 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 36 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Why does a physical change occur when water evaporates? A) Release of heat energy. B) Change in color. C) Absorption of heat energy. D) Formation of a new substance. Show Answer Correct Answer: C) Absorption of heat energy. 2. Boiling Point:Chemical or Physical Property A) Chemical Property. B) Physical Property. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical Property. 3. Why does a chemical change occur when milk turns sour? A) The milk is mixed with water. B) The milk is exposed to too much sunlight. C) The milk is too old to drink. D) Lactic acid is produced by the breakdown of lactose in the milk. Show Answer Correct Answer: D) Lactic acid is produced by the breakdown of lactose in the milk. 4. A substance that is formed as the result of a chemical reaction A) Product. B) Reactant. C) Starters. D) Enders. Show Answer Correct Answer: A) Product. 5. Mrs. Logan bought a bag of m&m's and carried them home from the store on a hot day. When she got home her candy had begin to melt. Why? A) Heat transferred from the candy to the bag. B) Heat evaporated from the bag to the candy. C) Heat transferred from the environment to the candy. D) Heat condensed from her hand. Show Answer Correct Answer: C) Heat transferred from the environment to the candy. 6. The word "soluble" means ..... A) Not able to dissolve. B) Able to dissolve. C) All the above. D) None of the above. Show Answer Correct Answer: B) Able to dissolve. 7. Which of the following is not a chemical property? A) Rusting. B) Boiling. C) Rotting. D) Burning. Show Answer Correct Answer: B) Boiling. 8. True or false:A chemical reaction requires at least one liquid at the start. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 9. The 3 main states of matter are A) Solid. B) Liquid. C) Gas. D) All of the above. Show Answer Correct Answer: D) All of the above. 10. Is this a Chemical or a Physical change?Fireworks A) Chemical. B) Physical. C) Both. D) Neither. Show Answer Correct Answer: A) Chemical. 11. Boiling point A) Physical property. B) Chemical property. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical property. 12. Which of the following examples includes only chemical changes that occur in the digestive process? A) Absorption of nutrients by villi in the small intestine. B) Chewing and swallowing food. C) Recycling of water from dissolved food back into the body. D) Reaction of saliva, stomach acid, bile, and pancreatic juices with food. E) Churning food in the stomach. Show Answer Correct Answer: D) Reaction of saliva, stomach acid, bile, and pancreatic juices with food. 13. You eat a hamburger from McDonald's from lunch and 20 piece chicken nuggets. Which of the following steps causes a chemical change in the digestion of the food? A) Your esophagus transports the food from your mouth to your stomach. B) Your teeth grind down the food into small pieces. C) Your stomach acids break down large food molecules into smaller food molecules. D) Your large intestine absorbs water that the food had. Show Answer Correct Answer: C) Your stomach acids break down large food molecules into smaller food molecules. 14. How does a chemical change affect the original substances? A) It only changes the color of the original substances. B) It has no effect on the original substances. C) It transforms the original substances into new substances with different properties. D) It creates a perfect replica of the original substances. Show Answer Correct Answer: C) It transforms the original substances into new substances with different properties. 15. Water freezing into ice is a A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical change. 16. Kim puts an ice cube in a beaker and it melts. This is a good example of: A) A physical change. B) A chemical change. C) An experiment. D) An analysis. Show Answer Correct Answer: A) A physical change. 17. Which answer below makes a correct statement about ice melting? A) Physical change only changes the color of the ice. B) Physical change only changes the size of the ice. C) Physical change changes the ice into something totally different. D) Physical change begins and ends with the same matter, just like ice melting into water. Show Answer Correct Answer: D) Physical change begins and ends with the same matter, just like ice melting into water. 18. Occurs when two or more molecules interact forming new molecules. A) Chemical Change. B) Physical Change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical Change. 19. Which of the following is not a clue that a chemical reaction has taken place? A) Changing size. B) Changing color. C) A gas being formed. D) Formation of a precipitate. Show Answer Correct Answer: A) Changing size. 20. Which of the following is an indication of chemical change A) Melting. B) Freezing. C) Burning. D) Evaporating. Show Answer Correct Answer: C) Burning. 21. Tarnishing of jewelries A) Physical Change. B) Chemical Change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical Change. 22. The correct word equation to show rusting is:"Iron + Water + Oxygen $\rightarrow$Rust on Iron"Choose the correct chemical equation for rusting from the options given below. A) Fe + HO$_{2 }$+ OH$_{2 }$$\rightarrow$ Fe$_{2}$O$_{3}$. xH$_{2}$O. B) Fe + H$_{2}$O$_{ }$+ O$_{2 }$$\rightarrow$ Fe$_{2}$O$_{3}$. xH$_{2}$O. C) Fe + H$_{2}$O$_{ }$+ O$_{2 }$$\rightarrow$ Fe$_{2}$O$_{3}$. D) H$_{2}$O$_{ }$+ O$_{2 }$$\rightarrow$ Fe$_{2}$O$_{3}$. xH$_{2}$O. Show Answer Correct Answer: B) Fe + H$_{2}$O$_{ }$+ O$_{2 }$$\rightarrow$ Fe$_{2}$O$_{3}$. xH$_{2}$O. 23. The newly formed matter from a chemical reaction A) Product. B) Reactant. C) Temperature. D) Mixture. Show Answer Correct Answer: A) Product. 24. When baking and cooking, what kind of changes do you see? A) Physical. B) Chemical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical. 25. Baking soda and vinegar combine to make carbon dioxide A) Chemical Change. B) Physical Change. C) All the above. D) None of the above. Show Answer Correct Answer: A) 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 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books