Which of the following is not a physical change

• GC Chemical Reactions

Which of the following is not a physical change?

1. Boiling of water to give water vapour
2. Melting of ice to give water
3. Dissolution of salt in water
4. Combustion of Liquefied Petroleum Gas (LPG)

Answer

A physical change involves only change in physical state whereas a chemical change results the formation of new substances. Boiling of water, melting of ice and dissolution of salt are physical changes as no new products are formed.

The correct option is D.