Here is the second question;
(2) A, B, C and D are dilute solutions of FeSO4, AgNO3, HCL and CuSO4, but not necessarily in that order. Q, R, S and T are strips of the metals Zn, Cu, Fe and Pb, but not necessarily in that order. Each of the metal was added to each of the solutions in separate test-tube. The following observation were made;