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How does melting of ice differ from electrolysis of water?

Answer and explanation

Correct answer: No new substance is formed when ice melts, whereas electrolysis of water forms new substances.

Melting of ice is a physical change because ice changes only into liquid water and no new substance is formed. In contrast, electrolysis of water uses electrical energy to produce hydrogen and oxygen gases from water. The formation of new substances shows that electrolysis is a chemical change. Therefore, option B is incorrect because electrolysis is not merely a change of state.

Related tags

ScienceClass10Chemical-ReactionsPhysical-ChangeElectrolysisWater

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