An iron ring is heated. Which of the following statements is incorrect for the given iron ring?

The ring expands

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The ring comes to the same size upon cooling

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The change occurring in this case is reversible

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The shape of the ring changes and the change is irreversible

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Solution

The correct option is D
The shape of the ring changes and the change is irreversible

An iron ring expands when heated and contract when cooled. The inner and the outer diameters of the ring changes, thus expanding the ring. When heat is removed, it contracts and regaining the original diameters approximately.

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