Chemistry - Metallurgy Question with Solution | TestHub
List - I (Metal extraction) | List - II (Process involve ) |
|---|---|
(A) Cassitarite → Metal | (P) Froth flotation |
(B) Heamatite → Metal | (Q) Magnetic separation |
(C) Sphalerite → Metal | (R) Roasting |
(D) Chalcopyrite → Metal | (S) Self reduction |
| (T) Reduction by C/CO |
Options:
Answer:
Solution:
(A) Cassiterite (SnO₂): Often contains magnetic impurities (Wolframite), so magnetic separation (Q) is used. The oxide is then reduced by C/CO (T).
(B) Hematite (Fe₂O₃): It is often concentrated by magnetic separation (Q), roasted (R) to remove moisture/impurities, and finally reduced by C/CO (T) in a blast furnace.
(C) Sphalerite (ZnS): Being a sulfide ore, it uses froth flotation (P) and roasting (R) to convert to oxide, followed by reduction by C/CO (T).
(D) Chalcopyrite (CuFeS₂): Concentrated via froth flotation (P), roasted (R), and undergoes self-reduction (S) during the smelting/bessemerization process.