Change in shape is the physical property of the substance. Chemical change of the compound is observed during a chemical reaction. Change in colour, production of the gas, formation of a precipitate are the examples of chemical change and can be sensed easily.
Vapour pressure, boiling point, density and shape are the examples of physical properties of compounds. Chemical change also leads to change in texture of the compound. A compound has both physical and chemical properties and its chemical reaction is enhanced by the catalyst.
The water repellant properties of waxes is very useful in the leaves of some plants, in the feathers of birds and also in cuticle of insects. Waxes in plant leaves reduce the amount of water that is lost by the leaves. The wax that is present in the birds' feather prevent them from getting wet with water.
