Question

An iron ring is heated. Which of the following statements 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.

Answer 1

The correct option is D The ring changes its shape and the change cannot be reversed.

As 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.

So, the ring expands on heating and comes back to its original size on cooling and the change is reversible.