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Which of the following involves only a physical change?

Answer and explanation

Correct answer: Freezing of water into ice

When water freezes, only its state changes from liquid to solid; both water and ice have the chemical formula \(\mathrm{H_2O}\). Thus, no new substance is formed, so this is a physical change. In contrast, rusting produces a new substance such as iron oxide, making it a chemical change.

Related tags

ScienceClass 10Chemical ReactionsPhysical ChangeChemical Change

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