Question

Which of the following combination of metal and metal salt solution will undergo a displacement reaction? [0.5 marks]

(a) Sodium chloride solution and copper
(b) Sodium chloride solution and magnesium
(c) Ferrous sulphate solution and silver
(d) Silver nitrate solution and copper

Answer 1

Option (d), Silver nitrate solution and copper

In a displacement reaction, a more reactive metal displaces a less reactive metal from its salt solution.

The reactivity of the metals given in the options is Sodium>Magnesium>Iron>Copper>Silver

Silver nitrate and copper metal undergo displacement reaction as copper is more reactive than silver. Hence, it displaces silver from silver nitrate solution to form copper nitrate solution. The reaction involved is:

$\text{Copper}+\text{Silver nitrate}\to \text{Copper nitrate}+\text{Silver}$