Give reason :Burning of paper is a chemical change.

Burning of paper is considered a chemical change due to several reasons:

Formation of new substances: When paper burns, it undergoes a chemical reaction called combustion. The complex molecules present in paper, primarily cellulose, break down into simpler molecules such as carbon dioxide, water vapor, and ash. These new substances have different chemical compositions than the original paper, indicating a chemical change.

Energy change: Burning paper is an exothermic reaction, meaning it releases energy in the form of heat and light. This energy is released due to the rearrangement of chemical bonds within the paper molecules. The release of energy is a characteristic of a chemical change.

Irreversibility: Once paper undergoes combustion, it cannot be easily reversed or restored to its original form. The chemical structure of the paper is altered, and the process cannot be easily undone. This irreversibility is another characteristic of a chemical change.

Change in physical properties: Burning paper results in a change in its physical properties. The paper turns into ashes, which have different properties than the original paper. Ashes are typically black, brittle, and have a different texture compared to the original paper. This change in physical properties indicates a chemical change has taken place.

In conclusion, the burning of paper exhibits characteristics such as the formation of new substances, energy change, irreversibility, and a change in physical properties, which are indicative of a chemical change.