Question

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 Sulphate 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 questions based on the above information :- (i) Which is the most active metal and 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) Container of which metal can be used to store both zinc sulphate solution and silver nitrate solution ? (v) Which of the above solutions can be easily stored in a container made up of

Answer 1

(i) B is the most active metal as it displaces iron from its salt solution.

(ii) B will displace Cu from CuSO4 solution because B is more reactive than copper.

(iii) D < C <A < B

(iv) Container of metal D can be used to store both ZnSO_{4} and AgNO_{3} solutions, because it cannot displace Zn and Ag from their salt solutions.

(v) ZnSO_{4} can be stored in a container made up of any of these metals.

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