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InterviewSolution
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21. Which of the following representa chemical change?I. Magnetisation of ironII. Condensation of liquidIII. Burning of fuelIV. Rusting of iron |
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Answer» when the properties of an substance is changed and this change is irreversible in nature . this is called chemical change .like formation of curd one milk converted into curd u cannt change curd into milk.part i and ii is a physical change once it is done u can change them means reverse them but part iii and iv is a chemical change one fuel is burnt it provides energy u cant get fuel again and once rust is formed u cannt get that rusted iron back . |
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