Multiple Choice
What is the source of the acidic pH of some mine runoff?
A) Iron ores are reduced by exposure to the atmosphere.
B) Pyrite is oxidized by exposure to the atmosphere and microbes.
C) Iron ores contain sulfuric acid (H₂SO₄) .
D) Sulfur-containing ores are reduced by exposure to oxygen.
E) Hydrogen gas trapped in ore reacts with the atmosphere to produce hydrochloric acid (HCl) .
Correct Answer:
Verified
Correct Answer:
Verified
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