This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 5 Physical And Chemical Changes – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 4 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Reacts with Acid: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. 2. Rusting occurs when iron is exposed to A) Oxygen and water. B) Soil and rain. C) Breeze and sunlight. D) Salt water and clouds. Show Answer Correct Answer: A) Oxygen and water. 3. Which of the following is a chemical property? A) Odor. B) Flammability. C) Boiling point. D) Conductivity. Show Answer Correct Answer: B) Flammability. 4. What will allow a solution to dissolve faster? A) Cold water. B) Hot water. C) Warm water. D) None of the above. Show Answer Correct Answer: B) Hot water. 5. The bacteria in the large intestine can digest some material, creating a gas. A) Physical. B) Chemical. C) Both. D) Neither. Show Answer Correct Answer: B) Chemical. 6. A chemical change may involve A) Evolution of gas. B) Change in temperature. C) Change in colour. D) All of the above. Show Answer Correct Answer: D) All of the above. 7. Which of these observations is an indication that a chemical reaction has occurred? A) Steam forms above boiling water. B) A solid forms when a clear solution is frozen. C) A solid forms when two clear solutions are mixed. D) Sugar crystals form on the sides of a boiling pot of sugar water. Show Answer Correct Answer: C) A solid forms when two clear solutions are mixed. 8. What are NOT signs of a physical change? A) Formation of a new substance. B) Change in color, release of gas, and absorption or release of energy. C) Change in state of matter. D) Change in texture. Show Answer Correct Answer: A) Formation of a new substance. 9. Which of these describes a chemical change? A) Water evaporates. B) Butter melts on warm toast. C) Aluminum foil is cut in half. D) A paper being burned. Show Answer Correct Answer: D) A paper being burned. 10. Potassium chlorate decomposes to potassium chloride and oxygen gas. A) Chemical Change. B) Physical Change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical Change. 11. Which one shows that a chemical reaction has occurred? A) Dissolving. B) Melting. C) Formation of a gas. D) Bending. Show Answer Correct Answer: C) Formation of a gas. 12. The minimum amount of energy required for a chemical reaction to occur A) Combustion. B) Activation energy. C) Reactant. D) Product. Show Answer Correct Answer: B) Activation energy. 13. When magnesium is burnt, a white substance is formed. This substance is ..... A) Oxygen Magnetite. B) Magnesium sulfide. C) Magnesium oxide. D) Magnesium chloride. Show Answer Correct Answer: C) Magnesium oxide. 14. Which observations prove a chemical change has occurred? A) Dissolving and expected color change. B) Mixing and dissolving. C) State of matter change and boiling water bubbles. D) Unexpected color change and temperature change. Show Answer Correct Answer: D) Unexpected color change and temperature change. 15. Particular types of matter with specific properties A) Substances. B) Manipulation. C) Change. D) Mixtures. Show Answer Correct Answer: A) Substances. 16. Color change like in a drop of food coloring in water, is a ..... change. A) Physical. B) Chemical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical. 17. When iron rusts, it's an example of a ..... change. A) Physical. B) Chemical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical. 18. When carbon dioxide is passed through the lime water, it turns milky due to the formation of A) Oxygen. B) Calcium carbonate. C) Copper sulphate. D) Nitrogen. Show Answer Correct Answer: B) Calcium carbonate. 19. How would you separate a mixture of two liquids that mix (miscible) together perfectly. A) Filtration. B) Magnetism. C) Chromatography. D) Distillation. Show Answer Correct Answer: D) Distillation. 20. Out of all the changes listed, which one is the physical change?Light or energy is releasedA gas is formedA precipitate is formedMeltingAn unexpected color change occurs A) Light or energy is released. B) A gas is formed. C) Melting. D) An unexpected color change occurs. Show Answer Correct Answer: C) Melting. 21. When a new substance is formed with different properties than the original substance it is called a A) Chemical change. B) Physical change. C) Freezing. D) Boiling. Show Answer Correct Answer: A) Chemical change. 22. A Chemical Change is also known as what? A) Physical Change. B) Physical Property. C) Chemical Reaction. D) Chemical Property. Show Answer Correct Answer: C) Chemical Reaction. 23. Which is an example of a chemical change? A) Cutting paper. B) Digesting Food. C) Crumbling paper. D) Boiling water. Show Answer Correct Answer: B) Digesting Food. 24. What are changes that result in a substance that is chemically the same from when it started? A) Chemical. B) Physical. C) Acids. D) Bases. Show Answer Correct Answer: B) Physical. 25. In a reaction A + B $\rightarrow$ C, reactant A has 5g and product C has 9g. How many grams should reactant B have? A) Hgum. B) 5g. C) Yag. D) 14g. Show Answer Correct Answer: A) Hgum. ← 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 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 10Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books