Question: 84: Match List-I with List-II.
| List-I (Ores) | List-II (Composition) |
|---|---|
| (a) Haematite | (i) \mathrm{Fe}_{3}\mathrm{O}_{4} |
| (b) Magnetite | (ii) \mathrm{ZnCO}_{3} |
| (c) Calamine | (iii) \mathrm{Fe}_{2}\mathrm{O}_{3} |
| (d) Kaolinite | (iv) \left[\mathrm{Al}_{2}(\mathrm{OH})_{4}\mathrm{Si}_{2}\mathrm{O}_{5}\right] |
Choose the correct answer from the options given below:
(1) (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
(2) (a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
(3) (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
(4) (a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)
Answer: Option (4)
Explanation:
Haematite is an important iron ore and its chemical composition is
\mathrm{Fe}_{2}\mathrm{O}_{3}.
Magnetite is another iron ore and its composition is \mathrm{Fe}_{3}\mathrm{O}_{4}.
Calamine is an ore of zinc and mainly consists of zinc carbonate,
\mathrm{ZnCO}_{3}.
Kaolinite is an aluminium ore and its composition is
\left[\mathrm{Al}_{2}(\mathrm{OH})_{4}\mathrm{Si}_{2}\mathrm{O}_{5}\right].
Thus, the correct matching is (a)-(iii), (b)-(i), (c)-(ii), (d)-(iv).