Question
Differentiate between a physical change and a chemical change. Give examples to substantiate your answer. [5 MARKS]
Answer: Option A
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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,Ice→Water→SteamBurning of Paper→AshesFor 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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:
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,Ice→Water→SteamBurning of Paper→AshesFor 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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