Which of the following pairs will give displacement reactions?
(a). NaCl solution and copper metal
(b). `MgCl_(2)` solution and aluminium metal.
(c). `FeSO_(4)` solution and silver metal.
(d). `AgNO_(3)` solution and copper metal.

Explanation

(a). Copper metal is less reactive than sodium metal (Na), so no displacement reaction will occur between NaCl solution and copper metal.
(b). Aluminimum metal is less reactive than magnesium metal (Mg). So no displacement reaction will take place between `MgCl_(2)` solution and aluminium metal.
(c). silver metal is less reactive than iron metal (Fe), so no displacement reaction will occur between `FeSO_(4)` solution and silver metal.
(d) Copper metal is more reactive than silver metal (Ag), soa displacement reaction will take place between `AgNO_(3)` solution and copper metal.