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Which of the following pairs will give displacement reactions? 

A. NaCl solution and copper metal 

B. MgCl2 solution and aluminium metal 

C. FeSO4 solution and silver metal 

D. AgNO3 solution and copper metal

1 Answer

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A metal which has high reactivity can displace a metal with low reactivity from its salt solution. By looking at the reactivity series one can write the order of reactivity: 

Na>Mg>Ca>Al>Fe>Cu>Ag

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