Question

Give reasons
(i) Sublimation of iodine is physical change (ii) Burning of Magnesium ribbon is a chemical change​

Answer 1

Answer:

Physical Change: There is no addition or deduction of energy during the physical change, but the energy required for completion of change is released when the change is reversed.

Chemical Change: Energy like light, pressure, heat energy is required for chemical changes. Such energy is generally absorbed or released during the chemical change.