3. An iron ring is heated. Which of the following statement about it is incorrect? (a) The ring expands. (b) The ring almost comes to the same size on cooling. (c) The change in this case is reversed. (d) The ring changes its shape and the change cannot be reversed.

Dear student

Most of the metals expand on heating and contract on cooling,
So when an iron ring is heated, it expands and comes back to its same size when cooled.

Hence option D is incorrect.
 

Regards

  • -2
(D)one is wrong :) :) :)
  • -1
(d) is wrong 
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