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(By Examveda Team)

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.