| List - I | List - II |
|---|---|
| (A) Zone refining | (I) Aluminium |
| (B) Blast furnace | (II) Iron |
| (C) Froth floatation process | (III) Metal Sulphides |
| (D) Hall-Heroalt process | (IV) Germanium |
Samples of four metals A, B, C, and D were added one by one to the following solutions. The results obtained were tabulated as follows:
Use the table above to answer the following questions about metals A, B, C, and D:
(i) Which is the least reactive metal?
(ii) What would be observed if C is added to a solution of copper sulphate?
(iii) Arrange the metals A, B, C, and D in the order of their decreasing reactivity.