Question

When a candle burns, both physical and chemical change take place. Identify these changes. Give another example of a fimiliar process in which both the physical and chemical change take place.

Answer 1

Chemical Changes in Burning Candle: When you light the candle, the wax present near the wick will melt. Wick absorbs the liquid wax. The liquid wax vaporizes due the heat produced by the flame. This wax vapor near to flame burns and gives new substances like Carbon Dioxide, Carbon soot, water vapours, heat and light.

Answer 2

there are certain changes in which both physical and chemical changes take place simultaneously. One such example can be eating food. Cutting of food by our teeth is an example of physical change where ase digestion of food is a chemical change. Another such example can be adding quicklime to water changing of water to steam is a physical change and H2O combining to CaO to form Ca(OH)2 is a physical change.
hope it helps you....