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Question

Which of the following can undergo a chemical reaction?


A

MgSO4+Fe

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B

ZnSO4+Fe

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C

MgSO4+Pb

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D

CuSO4+Fe

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Solution

The correct option is D

CuSO4+Fe


Explanation for correct option:

D. CuSO4+Fe

Displacement Reaction:

  • When a more reactive metal displaces a lesser reactive metal from its salt, is known as a displacement reaction.
  • As per the reactivity series of metal, metal placed above is regarded as more reactive and it can displace a metal that is placed below it.
  • Iron displaces copper from its solution as it is more reactive than copper according to the reactivity series.
  • Iron is more reactive than copper. Thus it displaces copper in the reaction to form Ferrous sulfateFeSO4.
  • This is an example of a Metal displacement reaction.

Explanation for incorrect options:

A. Mg is more reactive than Fe. Thus, no reaction will take place.

B. Zn is more reactive than Cu. Thus, no reaction will take place.

C. Mg is more reactive than Pb. Thus, no reaction will take place.

Hence, the correct option is D i.e. CuSO4+Fe.


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