Samples of four metals A, B, C and D were taken and added to the following solutions one by one. The results obtained have been tabulated as follows : Use the table given above to answer the following questions about metals A, B, C and D. (i) Which is the most reactive metal ? (ii) Arrange the metals A, B, C and D in the order of decreasing reactivity.

Samples of four metals A, B, C and D were taken and added to the follo

1.	Samples of four metals A, B, C and D were taken and added to the following solutions one by one. The results obtained have been tabulated as follows : Use the table given above to answer the following questions about metals A, B, C and D. (i) Which is the most reactive metal ? (ii) Arrange the metals A, B, C and D in the order of decreasing reactivity.
Answer» Solution :(i) B (ii) The BLUE colour fades as B displaces CU from `CuSO_(4)` solution (III) `B GT A gt C gt D`