Q. Gold and silver are extracted from their respective ores by _______
A) Roasting
B) Smelting
C) Hydro metallurgy
D) Leaching
✔ Correct Answer: Hydro metallurgy
Exam Insight
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A) Roasting
B) Smelting
C) Hydro metallurgy
D) Leaching
✔ Correct Answer: Hydro metallurgy
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