This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 5 Physical And Chemical Changes – Quiz 18 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 18 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The stomach releases hydrochloric acid and enzymes that break down the protein in meats and turn the protein into amino acids. This change is A) Physical. B) Chemical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical. 2. Rust will most likely occur when it is A) Wet. B) Greasy. C) Dry. D) None of the above. Show Answer Correct Answer: A) Wet. 3. Which of these is NOT a PROPERTY of matter? A) Size. B) Color. C) Shape. D) Quantity. Show Answer Correct Answer: D) Quantity. 4. Density: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. 5. Slicing a pellet of sodium metal into two pieces is an example of a ..... A) Physical Property. B) Physical Change. C) Chemical Property. D) Chemical Change. Show Answer Correct Answer: B) Physical Change. 6. Ice melting A) Chemical Change. B) Physical Change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical Change. 7. Which action causes a physical change? A) Cutting a piece of paper in half. B) Burning a wood log. C) Baking a cake. D) Rusting metal. Show Answer Correct Answer: A) Cutting a piece of paper in half. 8. Why does a chemical change occur when wood burns and turns into ash? A) The heat from the fire causes the wood to evaporate. B) The wood absorbs water and changes its composition. C) Chemical reaction with oxygen in the air. D) The wood is transformed by the light from the flames. Show Answer Correct Answer: C) Chemical reaction with oxygen in the air. 9. Sodium and chlorine combine in an explosive reaction to form table salt. A) Endothermic. B) Exothermic. C) All the above. D) None of the above. Show Answer Correct Answer: B) Exothermic. 10. A transformation in which new substances with different properties are formed. Example:rusting of iron. A) Chemical change. B) Physical change. C) Decomposition reaction. D) Solubility. Show Answer Correct Answer: A) Chemical change. 11. Substances that change in appearance but not in composition are an example of a ..... change. A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical. 12. Characteristic of Chemical Change. A) New Substance. B) Change in size. C) Change in State. D) Temporary change. Show Answer Correct Answer: A) New Substance. 13. When gases condense and liquids freeze energy is A) Lost. B) Gained. C) Stays the same. D) None of the above. Show Answer Correct Answer: A) Lost. 14. Digesting your food is an example of A) Chemical change. B) Physical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical change. 15. Frying Eggs A) Physical Change. B) Chemical Change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical Change. 16. The Best Friend's Club uses "invisible ink" to write notes to each other. The invisible ink is actually lemon juice that is clear when it dries on paper, but turns brown when a club member holds a burning candle under the paper. Once it is heated, it is never invisible again. What type of change is occurring when the paper is heated? A) Chemical Change. B) Physical Change. C) Elemental Change. D) Temperature Change. Show Answer Correct Answer: A) Chemical Change. 17. The ability to hammered into a thin sheet or be bent is A) Ductility. B) Solubility. C) Density. D) Malleability. Show Answer Correct Answer: D) Malleability. 18. During reaction of iron with copper sulphate, the colour of solution A) Changes from green to blue. B) Remains unchanged. C) Changes from blue to green. D) Changes from blue to brown. Show Answer Correct Answer: C) Changes from blue to green. 19. Hardness: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. 20. If you combine two or more substances that each keep their physical properties you create a A) Mixture. B) Burn it. C) Chemical reaction. D) Reactant. Show Answer Correct Answer: A) Mixture. 21. Which of the following processes in digestion is a chemical change? A) Chewing food in the mouth. B) Swallowing food. C) Stomach acid breaking down proteins. D) Food moving through the intestines. Show Answer Correct Answer: C) Stomach acid breaking down proteins. 22. T or F:Physical properties are VISIBLE (can be observed) and can be MEASURED. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 23. A physical change ..... the identity of the substance. A) Changes. B) Maintains. C) All the above. D) None of the above. Show Answer Correct Answer: B) Maintains. 24. Which of the following is evidence that a chemical change has occurred? A) Ice melting. B) Production of an odor. C) Paper being crumpled. D) Water evaporating. Show Answer Correct Answer: B) Production of an odor. 25. Carbon dioxide is what type of pure substance? A) Homeogeneous. B) Heterogeneous. C) Element. D) Compound. Show Answer Correct Answer: D) Compound. ← 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