Question

How can we say that burning of a candle is a chemical change but the glowing of bulb is a physical change?​

Answer 1

Answer:

Burning of candle involves both types of changes physical as well as chemical. In this process the solid wax changes into liquid wax i.e. the state of a substance changes, hence it is a physical change. Also, during burning of candle new substances like carbon dioxide gas and water vapour are produced, hence it is a chemical change as well.

Glowing of an electric bulb is a physical change since no new substance with different properties is formed

.

Explanation:

Also, during burning of candle new substances like carbon dioxide gas and water vapour are produced, hence it is a chemical change as well. Glowing of an electric bulb is a physical change since no new substance with different properties is formed.

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Answer 2

Answer:

burning of a candle is chemical change because it used to melt. and melting we cannot change again into a candle that's why and glowing of bulb is physical changes