Question

1. Which of the following pairs will give displacement reactions?

(a) NaCl solution and copper metal

(b) MgCl2 solution and aluminium metal

(c) FeSO4 solution and silver metal

(d) AgNO3 solution and copper metal​

Answer 1

Answer:

Option d i.e AgNO3 solution and copper is correct answer. Copper displace the silver cations (reducing them to the elemental metal), in the process copper itself being oxidised to Copper II cations (Cu2+) and going into solution. So silver metal precipitating out and a copper II nitrate solution will be remaining.

• Cu(s) + 2AgNO3 (aq) → Cu(NO3)2 (aq) + 2Ag (s)

Answer 2

Answer:

(d) Since copper is more reactive than silver so it will displace silver from silver nitrate.