Chemistry - Metallurgy Question with Solution | TestHub
Column-I | Column-II | Column-III |
|---|---|---|
(a) Zn | (i) Haematite | (p) Roasting followed by reduction with coke. The metal may be purified by fractional distillation |
(b) Cu | (ii) Sphalerite | (q) Roasting of sulphide ore partially and reduction. It is self reduction in a specially designed converter. leaching is also used in hydrometallurgy from low grade ores |
(c) Fe | (iii) Cryolite | (r) Electrolysis of oxide ore dissolved in molten salt. Good source of electricity is required |
(d) Al | (iv) Malachite | (s) Reduction of the oxide with CO and coke in blast furnace at 2170 K. |
.
For the ore contain same metal ion as in Calamine, CORRECT combination is :
Options:
Answer:
Solution:
The correct combination is (A) a-ii-p.
Calamine is zinc carbonate (ZnCO₃), so the target metal ion is zinc (Zn²⁺), corresponding to row (a). Sphalerite is a major zinc ore (ZnS), matching it with column (ii).
Metallurgy of Zinc: The zinc sulfide ore (ZnS) is roasted to form zinc oxide (ZnO), which is then reduced using coke to produce zinc metal, followed by purification via fractional distillation because of zinc's low boiling point, matching it with column (p).
