When iron is added to copper sulphate solution then resultant reaction occur is a type of:-

Decomposition reaction

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Displacement reaction

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Neutralisation reaction

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Combination reaction

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Solution

The correct option is B
Displacement reaction

Displacement reactions are those in which a more reactive metal displaces a less reactive metal. So, when iron is added to copper sulphate solution (blue colour) then iron diaplaces copper because iron is more reactive than copper and forms iron sulphate solution (green colour).

$F e (s) + C u S O_{4} (a q) \to F e S O_{4} (a q) + C u (s)$

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