${CuSO}_{4} (aq) + Fe (s) \underset{}{\to} {FeSO}_{4} (aq) + Cu (s) {FeSO}_{4} (aq) + Zn (s) \underset{}{\to} {ZnSO}_{4} (aq) + Fe (s)$
On the basis of the above reactions, indicate which is most reactive and which is least reactive metal out of zinc, copper and iron.

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Solution

In the first reaction, Fe displaces Cu from CuSO₄ solution. So Fe is more reactive than Cu.
In the second reaction, Zn displaces Fe from FeSO₄ solution. So Zn is more reactive than Fe.
Hence it can be concluded that Zn is the most reactive metal and Cu is the least reactive metal out of zinc, copper and iron.CuSO4 (aq) + Fe (s) −→−− FeSO4 (aq) + Cu (s)

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$C u S O_{4} (a q) + F e (s) ⟶ F e S O_{4} (a q) + C u (s) F e S O_{4} (a q) + Z n (s) ⟶ Z n S O_{4} (a q) + F e (s)$
On the basis of the above reactions, indicate which is most reactive and which is least reactive metal out of zinc, copper and iron.

CuSO4+Fe →FeSO4+ Cu

FeSO4+Zn →ZnSO4+ Fe

Which of the following statement is true on the basis of above reactions?

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

Choose the correct answer, among the following statements.

Q. State which of the following chemical reactions will take place or not, giving suitable reason for each:

(a) Z n_{(s)} + C u S o_{4 (a q)} \to Z n S O_{4 (a q)} + C u_{(s)}

(b) F e_{(s)} + Z n S O_{4 (a q)} \to F e S O_{4 (a q)} + Z n_{(s)}

(c) Z n_{(s)} + F e S O_{4 (a q)} \to Z n S O_{4 (a q)} + F e_{(s)}

Q. Four metals

Z n, F e, C u

and

A l

are taken and added to the following solutions one by one. The results obtained are tabulated below:

Metal	$Z n S O_{4} (a q)$	$F e S O_{4} (a q)$	$C u S O_{4} (a q)$	$A l_{2} (S O_{4})_{3} (a q)$
$Z n$	-	Displaced	Displaced	No reaction
$F e$	No reaction	-	Displaced	No reaction
$C u$	No reaction	No reaction	-	No reaction
$A l$	Displaced	Displaced	Displaced	-

From the above data, the decreasing order of reactivity of metals is-

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CuSO4 (aq) + Fe (s) → FeSO4 (aq) + Cu (s)FeSO4 (aq) + Zn (s) → ZnSO4 (aq) + Fe (s) On the basis of the above reactions, indicate which is most reactive and which is least reactive metal out of zinc, copper and iron.

${CuSO}_{4} (aq) + Fe (s) \underset{}{\to} {FeSO}_{4} (aq) + Cu (s) {FeSO}_{4} (aq) + Zn (s) \underset{}{\to} {ZnSO}_{4} (aq) + Fe (s)$
On the basis of the above reactions, indicate which is most reactive and which is least reactive metal out of zinc, copper and iron.