Question

Give three reason why melting of wax is considered physical change while burning a candle, achemical change

Answer 1

Answer:

Melting of wax is considered as a physical as well as a chemical cahnge because :

i ) Melting of wax from solid to liquid indicates physical change because in this process no new substance is formed and the properties of melted wax is same as the properties of solid wax.

ii ) When wax is burnt , a chemical reaction takes place which leads to the formation of carbon dioxide , ash & water vapour. Since new compounds are formed burning of wax is a chemical change.

Thus , melting of wax is a physical change and burning of wax is a chemical change.

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