Metals and Non – Metals

Which of the following pairs will give displacement reactions?

1. NaCl solution and copper metal
2. MgCl2 solution and aluminium metal
3. FeSO4 solution and silver metal
4. AgNO3 solution and copper metal.

Solution:

Copper, being more reactive than silver, can displace silver from AgNO3, Copper is less reactive than sodium, and hence, cannot displace sodium from NaCl.