Question

By giving a reason state why chemical change takes place in the following case: Burning of wood.

Answer 1

Chemical change:

• The process in which the composition of the substance is completely altered and a new product is formed is called a chemical change.
• It is an irreversible process.
• Burning of wood is a chemical change because burning wood is transformed into carbon dioxide $\left({\mathrm{CO}}_2\right)$, water vapors $\left({\mathrm{H}}_2\mathrm{O}\right)$ and ash.
• It is an irreversible and permanent change.

Hence, the burning of wood is a chemical change.