Teaching CSIR NET Mock Test Series Chemical Sciences Transition Elements and Inner Transition Elements
Reaction of an aqueous solution of X with NaOH forms a white gelatinous precipitate. Dissolution of this precipitate in excess NaOH gives Y.
Bubbling H2S gas into Y results in the formation of a white precipitate Z. Reaction of Z with dil. H2SO4 gives X. The X, Y and Z, respectively, are
1
X = PbSO4 · Y = Pb(OH)2, Z = PbS
2
X = ZnSO4. Y = Zn (OH)2. Z = ZnS
3
X = MnSO4. Y = Mn(OH)2 Z = MnS
4
X = CoSO4. Y = Co (OH)2 Z = CoS