52. Which of the following is not a chemical reaction? A.Burning of paper B.Digestion of food C.Conversion of water into steam D.Burning of coal
Answer: Option C Solution: The conversion of water into steam is an example of a physical change, where the state of the matter changes without changing its composition. A physical change involves a change in physical properties. Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, colour, volume and density.
