Match the anionic species given in Column I that are present in the ore(s) given in Column II
Column I | Column II |
(A) Carbonate | (P) Siderite |
(B) Sulphide | (Q) Malachite |
(C) Hydroxide | (R) Bauxite |
(D) Oxide | (S) Calamine |
(T) Argentite |
Siderite FeCO3
Malachite CuCO3.Cu(OH)2
Bauxite AlOx(OH)3-2x ; 0 < x < 1
Calamine ZnCO3
Argentite Ag2S
This question requires matching anionic species present in various ores. Let's analyze each ore and identify the anions present.
(P) Siderite: Chemical formula is FeCO3. It is an iron carbonate ore. Anion present: Carbonate (CO32-).
(Q) Malachite: Chemical formula is Cu2(OH)2CO3. It is a basic copper carbonate ore. Anions present: Hydroxide (OH-) and Carbonate (CO32-).
(R) Bauxite: It is a mixture of hydrous aluminium oxides, primarily AlO(OH) and Al(OH)3. Anion present: Hydroxide (OH-).
(S) Calamine: It is an ore of zinc with the formula ZnCO3. Anion present: Carbonate (CO32-).
(T) Argentite: Chemical formula is Ag2S. It is a silver sulphide ore. Anion present: Sulphide (S2-).
Now, let's match the anions from Column I with the ores:
(A) Carbonate: Present in Siderite (P), Malachite (Q), and Calamine (S).
(B) Sulphide: Present in Argentite (T).
(C) Hydroxide: Present in Malachite (Q) and Bauxite (R).
(D) Oxide: Bauxite (R) is primarily an oxide ore (Al2O3.xH2O), so it contains oxide anions (O2-).
The correct matches are:
(A) Carbonate → (P) Siderite, (Q) Malachite, (S) Calamine
(B) Sulphide → (T) Argentite
(C) Hydroxide → (Q) Malachite, (R) Bauxite
(D) Oxide → (R) Bauxite
Ores and Minerals: Ores are naturally occurring materials from which metals can be extracted economically. Minerals are naturally occurring inorganic substances with a definite chemical composition.
Common Ores and Their Formulae: