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13. What is the difference between displacement and double displacement reactions?Write equations for these reactions.

Answer»

Indisplacement reaction, one element from its salt is displaced by a more reactive element e.g. in following example, Cu is displaced by Zn from CuSO4because Zn is more reactive.

CuSO4+ Zn —> ZnSO4+ Cu

Indouble displacement reaction, exchange of ions takes place between two reactants to form new products.

Na2SO4+ BaCl2—> BaSO4+ 2NaCl

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