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Which change can be considered a reversible physical change?

Answer and explanation

Correct answer: Melting of ice and freezing again

The governing concept is reversibility without a change in chemical identity. Ice melts when heat is supplied and becomes liquid water; on removing heat, the same water freezes back into ice. The process is therefore a reversible physical change, and option C is correct. Only the state and particle arrangement change, while the chemical formula remains H2O. Burning wood and converting paper to ash produce new substances through chemical reactions, so they are not reversible physical changes. Souring milk also involves chemical and biological changes that cannot be reversed simply by cooling or reheating.

Related tags

Reversible ChangeMelting Of IcePhysical ChangeNature Of MatterSome Basic Concepts Of ChemistryChemistryClass 11 Mcq

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