sir
  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) sulpate Copper (II) sulpate Zinc sulphate Silver nitrate
A No reaction Displacement    
B Displacment   No reaction  
C No reaction No reaction No reaction Displacemet
D No reaction No reaction No reaction No reaction
Use the table above to answer the following questions about metals A, B, C and D.
(i) Which is the most reactive metal?
(ii) What would you observe when metal B is added to a solution of copper (II) sulphate?
(iii) Arrange the metals A, B, C and D in the order of decreasing reactivity.

Asked by seeni2005 | 24th Jul, 2016, 03:50: PM

Expert Answer:

From the given table we can write following observations:
1) A is less reactive than Fe but more reactive than Cu.
2) B is more reactive than Fe but less reactive than Zn.
3) C is more reactive than Ag but less reactive than Fe, Cu and Zn.
4) D is less reactive than Fe, Cu, Zn, Ag.
Hence we can conclude that,
(i) B is the most reactive metal.
(ii) B can displace Cu as B is more reactive than Cu.
(iii) The reactivity of these metals in the decreasing order is B > A > C > D.
 
Reactivity series,
 
Zn > B > Fe > A > Cu > C > Ag > D

Answered by Prachi Sawant | 24th Jul, 2016, 10:58: PM