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Question 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

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Solution

The correct statement is that when an iron ring, which is metallic in nature, is heated the ring expands and almost comes to the same size on cooling which indicates that the change can be reversed. So, option (d) is the incorrect statement and correct answer.


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