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 14 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 5 Physical And Chemical Changes Quiz 14 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When lithium metal is dropped into a container of water, the lithium sparks and fizzes and the water begins to bubble violently. The conclusion that can be drawn from that is: A) A new substance is created because this is a chemical change. B) No new substances are created because this is a physical change. C) A new substance is created because this is a physical change. D) No new substances are created because there is a chemical change. Show Answer Correct Answer: A) A new substance is created because this is a chemical change. 2. The chemical name of baking soda is Sodium hydrogencarbonate. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 3. Matter that has its own shape and takes up space. A) Solid. B) Liquid. C) Gas. D) None of the above. Show Answer Correct Answer: A) Solid. 4. A ..... is formed when different substances are combined such that no chemical change occurs. A) Solution. B) Solution. C) Substance. D) Mixture. Show Answer Correct Answer: D) Mixture. 5. When heat is added to a solid, the solid will A) Melt. B) Freeze. C) All the above. D) None of the above. Show Answer Correct Answer: A) Melt. 6. Glass bottle that is shattered A) Chemical Change. B) Physical Change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Physical Change. 7. What type of change occurs when a new substance is formed that has different properties from the original substances? A) Mutation. B) Chemical change. C) Physical change. D) Nuclear change. Show Answer Correct Answer: B) Chemical change. 8. What are phisical changes? A) They are reversible changes. B) They are not reversible changes. C) Non of these. D) All of these. Show Answer Correct Answer: A) They are reversible changes. 9. Why does a physical change occur when a piece of paper is torn into small pieces? A) The paper disappears completely. B) The paper turns into a different material. C) The size and shape of the paper have been altered without changing its chemical composition. D) The paper becomes invisible. Show Answer Correct Answer: C) The size and shape of the paper have been altered without changing its chemical composition. 10. When molecules are close, but not super close, you are referring to a ..... A) Solid. B) Liquid. C) Gas. D) None of the above. Show Answer Correct Answer: B) Liquid. 11. What is a common indicator of a chemical change when two substances are mixed? A) Change in texture. B) Change in temperature. C) Change in state. D) Formation of a precipitate. Show Answer Correct Answer: D) Formation of a precipitate. 12. Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of oxygen. Which of these is the best evidence that a chemical reaction occurs when coal burns? A) The shape of the coal changes. B) Coal is made up of more than one element. C) A new substance is produced. D) Oxygen is present. Show Answer Correct Answer: C) A new substance is produced. 13. Ice forms because heat is removed, causing the particles to move slower. This changes the water from a liquid to a solid. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 14. What do we know about the mass of the reactants and products of a reaction? A) The products have a greater mass than the reactants. B) The products mass equals the reactants mass. C) The reactants have a greater mass than the products. D) None of the above. Show Answer Correct Answer: B) The products mass equals the reactants mass. 15. What is cooking an egg? A) Chemical change. B) Both physical change and chemical change. C) Neither. D) Physical change. Show Answer Correct Answer: A) Chemical change. 16. Name the gas which turns lime water milky. A) Carbon dioxide. B) Oxygen. C) Nitrogen. D) None of the above. Show Answer Correct Answer: A) Carbon dioxide. 17. True or False:a physical change may produce a new substance. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 18. What type of change occurs when a substance reacts with an acid? A) Physical change. B) Neither physical nor chemical change. C) Chemical change. D) Both physical and chemical change. Show Answer Correct Answer: C) Chemical change. 19. Which of the following is an example of both a physical and a chemical change? A) Chopping vegetables with a knife. B) Burning a candle. C) Dissolving hot cocoa mix in water. D) Pouring cold water on a hot object. Show Answer Correct Answer: B) Burning a candle. 20. In an endothermic reaction, heat is ..... A) Taken in. B) Given out. C) All the above. D) None of the above. Show Answer Correct Answer: A) Taken in. 21. Evidance of a new substance being created includes A) Bubbles. B) Unexpected Color change. C) Unexpected temperature change. D) All of the choices are correct. Show Answer Correct Answer: D) All of the choices are correct. 22. Rotting Fruit (Like a brown banana) A) Physical Change. B) Chemical Change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical Change. 23. Which is not a bi-product of a chemical reactions? A) Bubbles. B) Melting. C) He is. D) Colour change. Show Answer Correct Answer: B) Melting. 24. Which change creates a NEW substance? A) Physical change. B) Chemical Change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical Change. 25. The ability of a substance to dissolve in another substance, usually a liquid like water. Example:You can keep adding salt to water until it reaches a point where it won't dissolve. A) Corrosion. B) Decomposition reaction. C) Combustion. D) Solubility. Show Answer Correct Answer: D) Solubility. 26. Chewing food to break it down into smaller particles represents a ..... change, but the changing of starch into sugars by enzymes in the digestive system represents a ..... change. A) Chemical then Physical. B) Physical then Chemical. C) Both Physical. D) Both Chemical. Show Answer Correct Answer: B) Physical then Chemical. 27. State of matter that has NO definite shape or volume A) Solid. B) Liquid. C) Gas. D) None of the above. Show Answer Correct Answer: C) Gas. 28. In a physical change, the identity of the substance A) Changes. B) Stays the same. C) All the above. D) None of the above. Show Answer Correct Answer: B) Stays the same. 29. Which claim best explains that a chemical change has occurred? A) Vinegar and baking soda mixed together and bubbles formed. B) Ice has formed because a cup of water was placed in the freezer. C) The salt dissolved into the water when it was stirred. D) The window shattered into many pieces when it was hit by a football. Show Answer Correct Answer: A) Vinegar and baking soda mixed together and bubbles formed. 30. Name the product that formed when copper sulphate solution reacts with iron nail. A) Iron sulphate. B) Iron hydroxide. C) Iron oxide. D) Iron. Show Answer Correct Answer: A) Iron sulphate. 31. Why does a physical change occur when cutting a piece of fruit into slices? A) The fruit gains magical powers. B) The shape and size of the fruit are being altered. C) The fruit changes color. D) The fruit becomes radioactive. Show Answer Correct Answer: B) The shape and size of the fruit are being altered. 32. Saliva contains ..... that helps with ..... A) Teeth, chemical digestion. B) Enzymes, mechanical digestion. C) Teeth, mechanical digestion. D) Enzymes, chemical digestion. Show Answer Correct Answer: D) Enzymes, chemical digestion. 33. Slicing a banana A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical change. 34. In an atom, what is the number of protons equal to? A) The number of molecules. B) The number of electrons. C) The number of neutrons. D) The number of nuclei. Show Answer Correct Answer: B) The number of electrons. 35. The ability to digest food A) Chemical. B) Physical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chemical. 36. Fireworks explode A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chemical change. 37. Matter can not be created nor destroyed:it can only be A) Destroyed a little bit. B) Invisible. C) Transformed, changed. D) None of the above. Show Answer Correct Answer: C) Transformed, changed. 38. ..... is when you observe one or more substances change into one or more new substances. A) Liquid reaction. B) Physical reaction. C) Chemical reaction. D) Temperature reaction. Show Answer Correct Answer: C) Chemical reaction. 39. Why does a physical change occur when water evaporates? A) Formation of a new substance. B) Absorption of heat energy. C) Release of heat energy. D) Change in color. Show Answer Correct Answer: B) Absorption of heat energy. 40. 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. 41. Why does a chemical change occur when milk turns sour? A) The milk is mixed with water. B) Lactic acid is produced by the breakdown of lactose in the milk. C) The milk is exposed to too much sunlight. D) The milk is too old to drink. Show Answer Correct Answer: B) Lactic acid is produced by the breakdown of lactose in the milk. 42. A substance that is formed as the result of a chemical reaction A) Product. B) Enders. C) Reactant. D) Starters. Show Answer Correct Answer: A) Product. 43. 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. 44. 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. 45. Which of the following is not a chemical property? A) Rotting. B) Rusting. C) Boiling. D) Burning. Show Answer Correct Answer: C) Boiling. 46. 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. 47. 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. 48. Is this a Chemical or a Physical change?Fireworks A) Chemical. B) Physical. C) Both. D) Neither. Show Answer Correct Answer: A) Chemical. 49. 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. 50. 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. 51. How does a chemical change affect the original substances? A) It has no effect on the original substances. B) It creates a perfect replica of the original substances. C) It only changes the color of the original substances. D) It transforms the original substances into new substances with different properties. Show Answer Correct Answer: D) It transforms the original substances into new substances with different properties. 52. 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. 53. Kim puts an ice cube in a beaker and it melts. This is a good example of: A) An experiment. B) A physical change. C) A chemical change. D) An analysis. Show Answer Correct Answer: B) A physical change. 54. 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. 55. 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. 56. Which of the following is not a clue that a chemical reaction has taken place? A) Changing size. B) Formation of a precipitate. C) Changing color. D) A gas being formed. Show Answer Correct Answer: A) Changing size. 57. Which of the following is an indication of chemical change A) Burning. B) Evaporating. C) Freezing. D) Melting. Show Answer Correct Answer: A) Burning. 58. 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. 59. 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 + H$_{2}$O$_{ }$+ O$_{2 }$$\rightarrow$ Fe$_{2}$O$_{3}$. B) Fe + H$_{2}$O$_{ }$+ O$_{2 }$$\rightarrow$ Fe$_{2}$O$_{3}$. xH$_{2}$O. C) H$_{2}$O$_{ }$+ O$_{2 }$$\rightarrow$ Fe$_{2}$O$_{3}$. xH$_{2}$O. D) Fe + HO$_{2 }$+ OH$_{2 }$$\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. 60. The newly formed matter from a chemical reaction A) Reactant. B) Temperature. C) Mixture. D) Product. Show Answer Correct Answer: D) Product. ← 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 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books