Sample pieces of five metals, A, B, C, D and E were added to the tabulated solutions separately. The results observed were as shown in the table below.

Metal	Solution
	${\mathrm{FeSO}}_4$	${\mathrm{CuSO}}_4$	${\mathrm{ZnSO}}_4$	${\mathrm{AgNO}}_3$	${\mathrm{Al}}_2{\left({\mathrm{SO}}_4\right)}_3$

 

Based on the observations recorded in the table answer following questions
(i) Which is the most reactive metal?
(ii) Which is the least reactive metal?
(iii) What would be observe if metal D were added to the solution of copper (II) sulphate?
(iv) What would be observed if metal E were added to a solution of iron (II) sulphate?
(v) Arrange the metals A, B, C, D and E in the order of their decreasing reactivity.