Match the ores in List-I with their chemical composition in List II.
| List I | List II |
| (A) Kaolinite | (I) \(FeCO_3\) |
| (B) Siderite | (II) \(ZnCO_3\) |
| (C) Malachite | (III) \([Al_2(OH)_4Si_2O_5]\) |
| (D) Calamine | (IV) \(CuCO_3.Cu(OH)_2\) |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
(A) Kaolinite — This matches (III) [Al2(OH)4Si2O5]. A form of clay; an ore of aluminium.
(B) Siderite — This matches (I) \( \ce{FeCO3} \). A carbonate ore of iron.
(C) Malachite — This matches (IV) \( \ce{CuCO3.Cu(OH)2} \). A basic copper carbonate.
(D) Calamine — This matches (II) \( \ce{ZnCO3} \). A carbonate ore of zinc.
Note: This question is from the pre-rationalised NCERT book (2022-23). The topic is not there in the latest NCERT book (2026-27), and it is also out of the CUET 2026 syllabus.
NCERT (Pre-rationalised edition, 2022-23):
Occurrence of Metals (rows of Table 6.1: Principal Ores of Some Important Metals)
| Metal | Ores | Composition |
|---|---|---|
| Aluminium | Kaolinite (a form of clay) | [Al2(OH)4Si2O5] |
| Iron | Siderite | FeCO3 |
| Copper | Malachite | CuCO3.Cu(OH)2 |
| Zinc | Calamine | ZnCO3 |