Burning of paper is a physical change which is slow.

Glowing of an electric bulb on the passage of electric current is a chemical change.

Evaporation is a physical change.

Digestion of food is a chemical change that involves release of energy.

An increase in temperature decreases the rate of evaporation.

The rate of evaporation is higher if the surface area is larger.

Increase in humidity in the air increases the rate of evaporation.

Naphthalene sublimes at boiling temperature.

A chemical change is accompanied by a change in mass.

Food undergoes many chemical changes during the process of digestion.