Step 1: Match the metals with their respective ores.
- (A) Mercury (Hg) is found in the ore Cinnabar (III).
- (B) Lead (Pb) is found in the ore Galena (IV).
- (C) Manganese (Mn) is found in the ore Pyrolusite (I).
- (D) Zinc (Zn) is found in the ore Calamine (II).
Step 2: Conclusion.
Thus, the correct matching is:
- (A) - (III), (B) - (IV), (C) - (I), (D) - (II)
The correct answer is option (4).
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.