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Question

Heating of iodine is a ___________ change.


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Solution

Physical change

  • It is a temporary change and affects only physical properties like shape, size, etc.
  • In a physical change, the composition remains the same but the arrangement of molecules changes.
  • In a physical change, there is very little to no absorption of energy.
  • In the physical change, no new substance is formed.
  • Physical changes are easily reversible.
  • In the physical change, the original substance can be recovered.

The reason for heating iodine is a physical change.

  • When the Iodine is heated, there is the formation of vapours of Iodine.
  • In the vapour form, the composition remains the same, and only the rearrangement of molecules is seen.
  • Also, the vapour form can be reversed by using physical methods.

Hence, due to the same composition of molecules in vapour form, the heating of iodine is a physical change.


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