Question

28. Sample 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.
(3)
Silver nitrate
Meta! Iron(II) sulphate Copper (II) sulphate Zinc sulphate
A No reaction Displacement
B Displacement
No reaction
С No reaction No reaction
No reaction
Displacement
D
No reaction
No reaction
No reaction
No reaction
Use the above table to answer the following questions about metal A,B,C and D.
(ii)
(iii)
Which is the most reactive metal?
What would you observe if B is added to solution of Copper (II) sulphate ?
Arrange the metals A,B,C and D in the order of decreasing reactivity.
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Answer 1

Explanation:

Four metals A, B, C and D are in turn added to the following solutions one by one. The observations made are tabulated below.

Metal Iron (II) sulphate Copper (II) sulphate Zinc sulphate Silver nitrate

A No reaction Displacement        -       -

B Displacement           - No reaction       -

C No reaction  No reaction No reaction Displacement

D No reaction No reaction No reaction No reaction

Answer the following based on the above information :

(i) Which is the most reactive metal? Why?

(ii) What would be observed, if 'B' is added to a solution of Copper (II) sulphate and why?

(iii) Arrange the metals A, B, C and D in order of increasing reactivity.

(iv) Which one among A, B, C and D metals can be used to make containers that can be used to store any of the above solutions safely?