Question

melting of wax is a physical change but burning of wax candle involves both physical and chemical change . explain​

Answer 1

Answer:

The melting of the solid wax to form liquid wax and the evaporation of liquid wax to form wax vapour are physical changes. The burning of the wax vapour is a chemical change. The wax vapour reacts with oxygen in the air to form new substances including carbon dioxide and ash.

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Answer 2

Explanation:

Melting of wax involves only the physical change. In melting of wax, the solid wax changes into liquid form when it is exposed to heat.

While burning of wax candle involves both physical and chemical change. This is so because the cotton present inside the candle burns out and a little ash is formed of that cotton. Thus azh cannot be retransformed to cotton bak again. So it is a chemical change. On the other hand, it is also a physical change because the solid wax melts to form a liquid