Question

Which among the following are physical or chemical changes?

Burning of Liquefied Petroleum Gas (LPG).

Answer 1

Physical change

• The changes which can be observed and specified like changes in color, hardness, rigidity, fluidity, density, melting point, boiling point, etc. are the physical changes.

Chemical change

• A chemical change is a change that results in the formation of new chemical substances.
• It involves the making or breaking of bonds between atoms.

Burning of Liquefied Petroleum Gas (LPG)

• Burning of Liquefied Petroleum Gas (LPG) is a chemical change since the new substance generated alters chemically and cannot be converted back to LPG.