Question

Which type of change is burning of candle

Answer 1

Answer:

No new substance is formed in burning of candle,there are both physical and chemical changes. The melting of the solid wax to form liquid wax and the évaporation of liquid wax to form wax vapour are physical changes.The burning of the wax vapour us a chemical change.

Explanation:

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Answer 2

• Burning of a candle is a chemical change as:

When a candle burns, the oxygen in the air reacts and forms carbon dioxide. A new substance, the CO2 is formed.

• Burning of a candle is a physical change as:

When the candle melts, no new substance is formed and the molten wax can be again solidified and made into a candle.

HENCE BURNING OF A CANDLE CAN BE CONSIDERED AS BOTH :

$physical \: change \\ and \\ chemical \: change$

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