8.Which of the following reactions are possible? (i) Mg+CuSO4→MgSO4+Cu (ii) Ca+MgSO4→CaSO4+Mg (iii) Cu+ZnSO4→CuSO4+Zn (iv) Fe+MgSO4→FeSO4+Mg



Dear student,

Given reactions are the example of displacement reaction. In displacement reaction, more reactive metal displaces the least reactive metal.

Magnesium is more reactive than copper so it can displace copper and reaction first is feasible.
Calcium is more reactive than Magnesium so it can displace Magnesium and reaction second is also feasible.
Zinc is more reactive than Copper and hence copper will not able to displace zinc so the third reaction is not feasible.
Magnesium is more reactive than Iron and hence iron will not able to displace Magnesium so the fourth reaction is also not feasible.
Reactivity order of metals can find out by given below-

 

K  ----- highly reactive

Na

Ca

Mg

Zn

Fe

Pb

H  ----- medium

Cu

Hg

Ag

Au

Pt  -------- less reactive


Hence the correct option is (a) (i) and (ii) only

Regards

 

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