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Identify the type of chemical reaction i...

Identify the type of chemical reaction in the following statements and define each of them:
(i) Digestion of food in our body
(ii) Rusting of iron
(iii) Heating of manganese dioxide with aluminium powder
(iv) Blue colour of copper sulphate solution disappears when iron filings are added to it

Text Solution

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(i) Decomposition Reaction : Carbohydrates are broken down to from glucose.
(Oxidation Reaction : When an iron object is left in most air for a considerable time , it gets covered with a red brown flaky substance called rust.
(iii) Displacement reaction : More reaction metal displaces less reaction metal from its salt solution .
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