List-I | List-II | ||
| (A) | Calamine | (I) | CuFeS2 |
| (B) | Siderite | (II) | ZnCO3 |
| (C) | Sphalerite | (III) | ZnS |
| (D) | Copper pyrite | (IV) | FeCO3 |
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.