Q120 A pale green solution of ferrous sulphate was taken in four separate test tubes marked I, II, III, and IV. Pieces of Cu, Zn, and Al were dropped in test tubes II, III and IV respectively. In which case(s)
(A) the color of ferrous sulphate solution will match with the color in a test tube I? Give reason.
(B) the color of ferrous sulphate solution will fade and black mass will be deposited on the surface of the metal?