Question

When a candle. burns, both physical and chemical change take place. How?

Answer 1

Answer:

When a candle burns both physical and chemical changes occur. When the candle burns , the wax begins to melt and changes it shape. This melted wax can be again moulded to form the same shape. Hence , it is reversible change since the properties of wax do not change.

Answer 2

Answer:

When a candle burns, both physical and chemical changes occur. Physical Changes: On heating, candle wax gets melted. Since it again turns into solid wax on cooling. So, the melting of wax and vapourisation of melted wax are physical changes.