Question

State the characteristics of physical change.

Answer 1

Characteristics of a physical change:

• A physical change involves the formation of no new substance and there is no change in the chemical composition of the substance undergoing the change.
• It is a temporary change.
• It is a reversible change as most of the time, the substance can be brought back to its original state.
• Only physical properties like hardness, colour, etc. are changed during a physical change.
• Energy is neither consumed nor released as chemical bonds are not involved in the physical change.
• Examples: Conversion of Water $\left({\mathrm{H}}_2\mathrm{O}\right)$ from solid to liquid form, melting of the wax.