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.
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?
Answers
Answer:
(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.
Comparison of Metals
Explanation:
(a) E is most reactive as it displaces iron, copper, zinc and silver.
(b) Copper would be displaced by B. So a reddish brown deposit of copper will be formed.
(c) E > B > A > C > D. E is most reactive and D is the least reactive based on the table showing displacement reactions.
(d) Container of metal D can be used to store ZnSO4 and AgNO3 as D does not react with them both.
(e) Aluminium sulphate and magnesium sulphate can be stored in a container made of any of the given metals, as none of them react with either of them.