This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Physical And Chemical Changes > Class 7 Science Chapter 5 Physical And Chemical Changes – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 2 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Ice cream melting A) Chemical change. B) Physical change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical change. 2. During digestion the body uses both physical and chemical changes to move and process food. Which of the following is an example of a physical change? A) Teeth breaking food down into smaller pieces. B) Protein breaking down into amino acids in the stomach. C) Enzymes breaking down carbohydrates into simple sugars. D) Hydrochloric acid breaking down fats in the stomach. Show Answer Correct Answer: A) Teeth breaking food down into smaller pieces. 3. Which of these is a chemical property? A) Ability to be cut. B) Ability to react with acid. C) Ability to melt when heated. D) Ability to be broken. Show Answer Correct Answer: B) Ability to react with acid. 4. When you swallow your food and the food is then getting digestive in stomach acid and different enzymes, that is considered ..... A) Mechanical digestion. B) Physical change. C) Chemical change. D) Chemical digestion. Show Answer Correct Answer: D) Chemical digestion. 5. What is the example of a chemical change A) Burning of paper. B) Breaking of glass. C) Cutting of clothes. D) None of the above. Show Answer Correct Answer: A) Burning of paper. 6. If Mrs. Larmour put our crystals in a warm and dry environment, what would most likely happen to the water in the cups? A) The liquid water would freeze. B) The amount of water would not change. C) The water would evaporate until it is all gone. D) None of the above. Show Answer Correct Answer: C) The water would evaporate until it is all gone. 7. What is the definition of physical change? A) Any change that results in the formation of new chemical substances. B) Changes that result in the shape/form of a substance,. C) All the above. D) None of the above. Show Answer Correct Answer: B) Changes that result in the shape/form of a substance,. 8. Which one is the definition of chemical property? A) A property or characteristic of a substance that is observed during a reaction where the chemical composition of a substance is changed. B) Any change that results in the formation of new chemical substances. C) Combust content. D) None of the above. Show Answer Correct Answer: A) A property or characteristic of a substance that is observed during a reaction where the chemical composition of a substance is changed. 9. Brittleness: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. 10. A change that alters the physical properties(appearance) of a substance without changing what the substance is MADE of (composition)! A) Physical Change. B) Chemical Change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical Change. 11. True or false:The only chemical changes that generates light are ones that explode or generate flames. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 12. In a chemical change, the identity of a substance A) Changes. B) Stays the same. C) All the above. D) None of the above. Show Answer Correct Answer: A) Changes. 13. Why does a block of wood float, but a small nail sink in water? A) The nail is more dense than the wood. B) The wood is more dense than the nail. C) They are equal in density but made of different materials. D) None of the above. Show Answer Correct Answer: A) The nail is more dense than the wood. 14. 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. 15. 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. 16. Which of the following is a chemical property? A) Odor. B) Flammability. C) Boiling point. D) Conductivity. Show Answer Correct Answer: B) Flammability. 17. 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. 18. 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. 19. 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. 20. 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. 21. 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. 22. Which of these describes a chemical change? A) Water evaporates. B) Aluminum foil is cut in half. C) A paper being burned. D) Butter melts on warm toast. Show Answer Correct Answer: C) A paper being burned. 23. 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. 24. Which one shows that a chemical reaction has occurred? A) Bending. B) Melting. C) Dissolving. D) Formation of a gas. Show Answer Correct Answer: D) Formation of a gas. 25. The minimum amount of energy required for a chemical reaction to occur A) Activation energy. B) Product. C) Reactant. D) Combustion. Show Answer Correct Answer: A) Activation energy. 26. When magnesium is burnt, a white substance is formed. This substance is ..... A) Magnesium chloride. B) Magnesium sulfide. C) Magnesium oxide. D) Oxygen Magnetite. Show Answer Correct Answer: C) Magnesium oxide. 27. 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. 28. Particular types of matter with specific properties A) Manipulation. B) Mixtures. C) Substances. D) Change. Show Answer Correct Answer: C) Substances. 29. 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. 30. 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. 31. When carbon dioxide is passed through the lime water, it turns milky due to the formation of A) Nitrogen. B) Calcium carbonate. C) Oxygen. D) Copper sulphate. Show Answer Correct Answer: B) Calcium carbonate. 32. How would you separate a mixture of two liquids that mix (miscible) together perfectly. A) Distillation. B) Magnetism. C) Chromatography. D) Filtration. Show Answer Correct Answer: A) Distillation. 33. 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) Melting. B) A gas is formed. C) Light or energy is released. D) An unexpected color change occurs. Show Answer Correct Answer: A) Melting. 34. When a new substance is formed with different properties than the original substance it is called a A) Chemical change. B) Boiling. C) Freezing. D) Physical change. Show Answer Correct Answer: A) Chemical change. 35. A Chemical Change is also known as what? A) Chemical Property. B) Physical Property. C) Chemical Reaction. D) Physical Change. Show Answer Correct Answer: C) Chemical Reaction. 36. What are changes that result in a substance that is chemically the same from when it started? A) Bases. B) Physical. C) Acids. D) Chemical. Show Answer Correct Answer: B) Physical. 37. In a reaction A + B $\rightarrow$ C, reactant A has 5g and product C has 9g. How many grams should reactant B have? A) 14g. B) Yag. C) 5g. D) Hgum. Show Answer Correct Answer: D) Hgum. 38. The mouth digests (breaks down) ..... by chewing. A) Mechanically. B) Chemically. C) Elimination. D) Absorption. Show Answer Correct Answer: A) Mechanically. 39. Which change describes a substance that changes shape, form, or appearance but is still the same substance? A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical change. 40. What is the main difference between a chemical change and a physical change? A) Physical changes result in new substances, while chemical changes do not. B) Physical changes involve energy changes, while chemical changes do not. C) Chemical changes result in new substances, while physical changes do not. D) Chemical changes are reversible, while physical changes are not. Show Answer Correct Answer: C) Chemical changes result in new substances, while physical changes do not. 41. A student listed some changes observed in daily life. Which change is an example of a physical change? A) Forming yogurt from milk. B) Rotting of a dead log of wood. C) Heating of corn kernels to make popcorn heating of corn kernels to make popcorn. D) Crushing sugar candy into powder. Show Answer Correct Answer: D) Crushing sugar candy into powder. 42. Mrs. McGinnis begins grading papers. She writes on it with a marker. Then, she accidentally tears the paper in half. So, she ends up crumpling the paper into a ball and throws it away. Which are examples of physical changes? A) Writing with marker. B) Tearing it in half. C) Crumpling it up. D) All of the above. Show Answer Correct Answer: D) All of the above. 43. What change in matter happens when the wet clothes hung on a clothesline during a sunny day become dry? A) Liquid to gas. B) Liquid to solid. C) All the above. D) None of the above. Show Answer Correct Answer: A) Liquid to gas. 44. When two substances are combined and create their own heat and light, this is a ..... change. A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical. 45. Is breaking bond of large molecules from food 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. 46. Baking a cake is a (a) change. A) A. chemical. B) Physical. C) Emotional. D) None of the above. Show Answer Correct Answer: A) A. chemical. 47. Which of the following is an evidence of a chemical change? A) Breaking of glass. B) Melting of ice. C) Boiling of water. D) A change in color. Show Answer Correct Answer: D) A change in color. 48. Is cooking an egg a A) Chemical change. B) Physical change. C) Neither. D) Both. Show Answer Correct Answer: A) Chemical change. 49. You make chocolate milk. A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical change. 50. What property stays the same during physical and chemical changes? A) Density. B) Arrangement of particle. C) Shape. D) Mass. Show Answer Correct Answer: D) Mass. 51. Which of these shows a chemical change? A) Water melting. B) Baking soda reacting with vinegar and releasing a new gas. C) Water evaporating. D) Slicing up an apple. Show Answer Correct Answer: B) Baking soda reacting with vinegar and releasing a new gas. 52. Which of the following is an example that includes evidence of a chemical reaction? A) A sample of zinc is placed in water and it settles to the bottom. B) A solid block of ice is heated and it completely melts into a liquid. C) Sugar that is burned gives off an odor and turns brown and then black. D) A tomato is placed into a blender and chopped up into smaller pieces. Show Answer Correct Answer: C) Sugar that is burned gives off an odor and turns brown and then black. 53. Sign of chemical change A) Unexpected temperature change. B) Shape change. C) Texture change. D) None of the above. Show Answer Correct Answer: A) Unexpected temperature change. 54. Hydrochloric acid reacts with potassium hydroxide to produce a salt, water, and heat. A) Chemical Change. B) Physical Change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical Change. 55. What is the process by which a chemical change occurs? A) Chemical reaction. B) Conservation of Matter. C) Condensation. D) Physical Change. Show Answer Correct Answer: A) Chemical reaction. 56. Lighting a match A) Physcial change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical change. 57. When you increase the energy by heating a liquid what happens to the motion of the molecules A) They slow down. B) They speed up. C) Heat doesnt change the motion of the molecules. D) None of the above. Show Answer Correct Answer: B) They speed up. 58. Scenario:Iron rusts when exposed to air. Does a chemical or physical change occur? A) Change in state. B) Physical change. C) Chemical change. D) Change in color. Show Answer Correct Answer: C) Chemical change. 59. Is bleaching your hair a physical or chemical change? A) Physical. B) Chemical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical. 60. A new substances that results from a chemical reaction. A) Products. B) Reactants. C) Chemical Change. D) Chemical Reaction. Show Answer Correct Answer: A) Products. ← PreviousNext →Related QuizzesScience QuizzesClass 7 QuizzesClass 7 Science Chapter 5 Physical And Chemical Changes Quiz 1Class 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books