Question

State the characteristics of chemical change.

Answer 1

Characteristics of chemical change:

• A chemical change involves the formation of one or more new substances and there is a change in the chemical composition of the substance undergoing the change.
• It is a permanent change.
• It is an irreversible change mostly as the substance undergoing change can not be brought back to its original state.
• Physical as well as chemical properties of the substance change during a chemical change.
• Energy is either consumed when bonds are broken or released when chemical bonds are formed.
• Examples: Rusting of Iron $\left(\mathrm{Fe}\right)$, Burning of wood.