Question

5. When a candle burns, both physical and chemical changes occur. Explain.
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Answer 1

Answer:

burning of candle is both physical and chemical changes as wick burn it cannot be reversed so chemical change and melting of wax is physical it can be reversed by freezing it. :)

Answer 2

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

hope it helps...