question_answer

  Write difference between a physical change and a chemical change.

Answer:

                  The differences between a physical change and a chemical change are

S. No.	Physical change	Chemical change
(i)	No new chemical substance is formed	A new chemical substance is formed
(ii)	The change is reversible.	The change is normally difficult to reverse.
(iii)	Its examples are melting, freezing, evaporation. Condensation, boiling, sublimation, dissolving and expansion.	Its examples are combustion, oxidation, chemical decomposition and chemical combination.