Four metals $$A$$, $$B$$, $$C$$ and $$D$$ are in turn added to the following solutions one by one. The observations made are tabulated below.
Metal | Iron (II) sulphate | Copper (II) sulphate | Zinc sulphate | Silver nitrate |
A | No reaction | Displacement | - | - |
B | Displacement | - | No reaction | - |
C | No reaction | No reaction | No reaction | Displacement |
D | No reaction | No reaction | No reaction | No reaction |
Answer the following based on the above information :
(i) Which is the most reactive metal? Why?
(ii) What would be observed, if '$$B$$' is added to a solution of Copper (II) sulphate and why?
(iii) Arrange the metals $$A$$, $$B$$, $$C$$ and $$D$$ in order of increasing reactivity.
(iv) Which one among $$A$$, $$B$$, $$C$$ and $$D$$ metals can be used to make containers that can be used to store any of the above solutions safely?