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Question

Differentiate between a physical change and a chemical change. Give examples to substantiate your answer. [5 MARKS] 


Solution

Differences with examples: 5 Marks

PhysicalChemicalComposition of the substance does notComposition of the substance changes.change.Most changes are reversible.Most changes are irreversible.No new substances are formed, e.g,New substances are formed, e.g,IceWaterSteamBurning of PaperAshesFor example, melting of ice, dissolving salt inFor example, rusting of iron, decay of foodwaterPhysical changes are those changes whichChemical changes involve change in chemicalinvolve change in only physical properties like,properties of the substances and change incolor, size, shape and state of substances etc.chemical composition also.

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