question_answer

  Samples of four metals A, B, C and D were taken and added to the following solution one by one. The results obtained have been tabulated as follows:  

Metal	Iron(II) sulphate	Copper(II) sulphate	Zinc sulphate	Silver nitrate
A B C D	No reaction Displacement No reaction No reaction	Displacement ? No reaction No reaction	- No reaction No reaction No reaction	- - Displacement No reaction

Use the table above to answer the following questions about metals A, B, C and D. (a) Which is the most reactive metal? (b) What would you observe if B is added to a solution of copper(ii) sulphate? (c)Arrange the metals A, B, C and D in the order of decreasing reactivity. [NCERT]

Answer:

                  (a) B is most reactive. (b) B will displace copper from copper (II) sulphate. (c) B > A > C > D.