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
Explanation:
नहीं मालूम है तो सुंदर ही है बोल
Answer:
(i) Metal B is the most reactive as it gives displacement reaction with iron (II) sulphate.
(ii) When metal B is added to copper (II) sulphate solution, a displacement reaction will take place because of which the blue colour of copper (II) sulphate solution will fade and a red-brown deposit of copper will be formed on metal B
(iii)Metal B is the most reactive because it displaces iron from its salt solution. Metal A is less reactive because it displaces copper from its salt solution. Metal C is still less reactive because it can displace only silver from its salt solution and metal D is the least reactive because it cannot displace any metal from its salt solution. Hence, the decreasing order of reactivity of the metals is B > A > C > D.