Question

A light green coloured solution of sulphate salt of metal 'P' is taken in a beaker, a rod of another metal 'Q' is put in this solution as shown in the following figures: 

Hint:

When a more reactive metal displaces a less reactive metal from its solution, this is called a displacement reaction. The reactivity series can help predict which metal will displace another.

Answer 1

Step 1: Metal identification. Metal P (Cu) is displaced by metal Q (Zn) in the solution. Zinc (Zn) is more reactive than copper (Cu), according to the reactivity series; therefore, zinc displaces copper from its sulfate solution.
Step 2: Chemical equation. The reaction is: \[ {Zn (s)} + {CuSO}_4 (aq) \rightarrow {Cu (s)} + {ZnSO}_4 (aq) \] 
Step 3: Reactivity series conclusion. Zinc (Zn) is more reactive than copper (Cu), which aligns with the reactivity series. More reactive metals displace less reactive metals from their compounds.