Question

37. Which of the following displacement reactions is
not possible?
(1) Pb + CuCl2 → PbCl2 + Cu
(2) Fe + Cuso, → FeSO4 + Cu
(3) Cu + ZnSO4 → CuSO4 + Zn
(4) Zn + AgNO3 → ZnNO3 + Ag​

Answer 1

Explanation:

option 4

may be it's help you

Answer 2

(3) Cu + ZnSO4 → CuSO4 + Zn

The displacement reaction that will not be possible is-

Cu + ZnSO4 → CuSO4 + Zn.

The reason why this reaction will not be possible is

• Copper is less reactive than zinc
• in such a reaction where displacement is supposed to take place the metal being displased from the salt should have a lower potential of reaction
• so that it can be replaced by the incoming metal

But in this case, we can clearly observe that ZINC is more reactive than COPPER. Therefore displacement will not take place.

Therefore, the displacement reaction that will not be possible is-

Cu + ZnSO4 → CuSO4 + Zn.