Chemistry - Metallurgy Question with Solution | TestHub
How many are correctly matched :
(i) Self reduction → Extraction of Pb
(ii) Carbon reduction → Exctraction of Al
(iii) Complex formation and metal displacement → Extraction of Ag
(iv) Disintegration of iodide → Extraction of Ti
(v) Cyanide process → Extraction of Cu
(vi) Froath flotation process → Pine oil
(vii) Electrolytic reduction → Extraction of Mg
(viii) Zone refining ⟶ Highly pure Ge
Answer:
Solution:
Statement (ii) is incorrect because Aluminum (Al) is extracted using electrolytic reduction (Hall-Héroult process), not carbon reduction.
Statement (v) is incorrect because the cyanide process is used for extracting Gold (Au) and Silver (Ag), while Copper (Cu) is extracted via smelting and self-reduction.
The remaining six statements—(i), (iii), (iv), (vi), (vii), and (viii)—are all perfectly correct metallurgical facts.
