Why is combustion of liquified petroleum gas a chemical change?

1.	Why is combustion of liquified petroleum gas a chemical change?
Answer» (a) Evaporation of petrol is a physical change because no new chemical substance is formed. (b) Burning of LPG is a chemical change because on burning, LPG forms CO2and H2O. ... (e) It is a physical change, because solid vapours and no new chemical substance is formed.

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