Question

when a candle burns both physical and chemical changes take place.Explain. ​

Answer 1

Explanation:

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 & chemical changes occur. On heating, candle wax melts and form liquid wax. It is a physical change. Since it again turns into solid wax on cooling. This is a reversible change. When a candle is burnt in air, the mass of the product is increased due to atmospheric oxygen which show a that it is a chemical change.

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