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Sample of five metals ‘A’, ‘B’, ‘C’, ‘D’ and ‘E’ was taken and added to the following solution one by one. The results obtained have been tabulated as follows. 

Metal FeSO4 ZnSO4 AgNO3 Al2(SO4)3 MgSO4 CuSO4
A No reaction No reaction Displacement No reaction No reaction Displacement
B Displacement No reaction Displacement No reaction No reaction Displacement
C No reaction No reaction Displacement No reaction No reaction No reaction
D No reaction No reaction No reaction No reaction No reaction No reaction
E Displacement Displacement Displacement No reaction No reaction Displacement

Use the above table to answer the following questions about the given metals. 

(a) Which of them is most reactive and why? 

(b) What would you observe if ‘B’ is added to CuSO4

(c) Arrange ‘A’, ‘B’, ‘C’, ‘D’ and ‘E’ in the increasing order of reactivity. 

(d) Container of which metal can store zinc sulphate and silver nitrate solution? 

(e) Which of the above solution(s) can be stored in a container made of any of these metals and why?

1 Answer

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(a) E is most reactive. Because it react with most substances. 

(b) Reddish brown deposit of copper will be formed since displacement has taken place. 

(c) E>B>A>C>D reason: The more it reacts the more reactive it is. Just count a number of displacements a metal will give. 

(d) Container of metal D can be used for this purpose as it does not react with any of them. 

(e) Aluminium and magnesium sulphates can be used to store in any container because the react with none.

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