Which of the following reactions will not occur ? Why not?
(a) $M g S O_{4} (a q) + C u (s) ⟶ C u S O_{4} (a q) + M g (s)$
(b) $C u S O_{4} (a q) + F e (s) ⟶ F e S O_{4} (a q) + C u (s)$
(c) $M g S O_{4} (a q) + F e (s) ⟶ F e S O_{4} (a q) + M g (s)$

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Solution

Answer :

Reactions (a) and (c) will not occur because copper is less reactive than magnesium. So, it cannot displace magnesium from its salt solution, the equation of which is shown in reaction (a).
Similarly, iron is less reactive than magnesium. So, it cannot displace magnesium from its salt solution, the equation of which is shown in reaction (c).

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Similar questions

Q. State, giving reasons, which of the following reactions will occur and which will not:
(a) MgSO₄ (aq) + Cu(s) → CuSO₄ (aq) + Mg(s)
(b) CuSO₄ (aq) + Fe (s) → FeSO₄(aq) + Cu(s)
(c) MgSO₄ (aq) + Fe (s) → FeSO₄ (aq) + Mg(s)

Q. Which of the following reactions will not occur? Why not?
(a)

{MgSO}_{4} (aq) + Cu (s) \underset{}{\to} {CuSO}_{4} (aq) + Mg (s)

(b)

{CuSO}_{4} (aq) + Fe (s) \underset{}{\to} {FeSO}_{4} (aq) + Cu (s)

(c)

{MgSO}_{4} (aq) + Fe (s) \underset{}{\to} {FeSO}_{4} (aq) + Mg (s)

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)}

Identify the type of reaction in the following examples :
(i) $N a_{2} S O_{4} (a q) + B a C l_{2} (a q) \to B a S O_{4} (s) + 2 N a C l (a q)$
(ii) $F e (s) + C u S O_{4} (a q) \to F e S O_{4} (a q) + C u (s)$
(iii) $2 H_{2} (g) + O_{2} (g) \to 2 H_{2} O (l)$

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.

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Which of the following reactions will not occur ? Why not? (a)MgSO4(aq)+Cu(s)⟶CuSO4(aq)+Mg(s) (b) CuSO4(aq)+Fe(s)⟶FeSO4(aq)+Cu(s) (c) MgSO4(aq)+Fe(s)⟶FeSO4(aq)+Mg(s)

Which of the following reactions will not occur ? Why not?
(a) $M g S O_{4} (a q) + C u (s) ⟶ C u S O_{4} (a q) + M g (s)$
(b) $C u S O_{4} (a q) + F e (s) ⟶ F e S O_{4} (a q) + C u (s)$
(c) $M g S O_{4} (a q) + F e (s) ⟶ F e S O_{4} (a q) + M g (s)$