Question

Consider the following cases:
(a) CaSO₄ + Al →
(b) CuSO₄ + Ca →
(c) FeSO₄ + Cu →
(d) ZnSO₄ + Mg →
The cases in which new products will form are –

• (a) and (b)
• (b) and (c)
• (c) and (d)
• (b) and (d)

Answer 1

The Correct Option is D

- (b) CuSO$_4$ + Ca: Calcium displaces copper because calcium is more reactive than copper.
\[\text{Ca + CuSO}_4 \, \rightarrow \, \text{CaSO}_4 \, + \, \text{Cu}.\]
- (d) ZnSO$_4$ + Mg: Magnesium does not displace zinc because magnesium is less reactive.
New products form in cases (b) and (d).