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Which of the following examples involves a change in properties and the formation of a new substance?

Answer and explanation

Correct answer: Rusting of iron

When iron rusts, it reacts with oxygen and moisture in air to form rust, a new substance with properties different from those of iron. Therefore, rusting is a chemical change. In contrast, breaking glass, folding paper, and melting ice are physical changes because no new substance is formed.

Related tags

ScienceClass-10Chemical-ReactionsChemical-ChangeRustingPhysical-Change

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