Question

Consider the following cases:

1. \[\ce{CaSO4 + Al ->}\]
2. \[\ce{CuSO4 + Ca ->}\]
3. \[\ce{FeSO4 + Cu ->}\]
4. \[\ce{ZnSO4 + Mg ->}\]

The cases in which new products will form are:

विकल्प

• a and b

• b and c

• c and d

• b and d

Answer 1

b and c

Explanation: 

\[\ce{CaSO4 + Al}\] (case a) and \[\ce{FeSO4 + Cu}\] (case c) do not displace \[\ce{Ca}\] and \[\ce{Fe}\] from their sulphates due to their lower reactivity. In \[\ce{CuSO4 + Ca and ZnSO4 + Mg}\] reactions, \[\ce{Ca}\] and \[\ce{Mg}\] are more reactive and displace Cu and Zn from the sulphates, resulting in the formation of \[\ce{CaSO4 and MgSO4}\].