The process of converting metal sulfides to metal oxides is called
A) roasting.
B) smelting.
C) reduction.
D) leaching.
E) oxidation.
Correct Answer:
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Q20: The industrial production of ammonia from nitrogen
Q21: The _ process uses a boiling 30%
Q22: The most common source for commercial production
Q23: What gas is produced during the Hall-Héroult
Q24: The debris accompanying a mineral is called
A)slag.
B)gangue.
C)ore.
D)halite.
E)ash.
Q26: Calcium oxide is added to molten iron
Q27: Hydrometallurgy uses _ to separate a metal
Q28: Pyrometallurgy uses _ to separate a metal
Q29: The process that selectively extracts a metal
Q30: Cryolite, Na3AlF6, is used in the electrolysis
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