Multiple Choice
What is the purpose of adding zinc powder to a solution of Au(CN) 2- ?
A) to precipitate the cyanide- gold complex
B) to form a gold- zinc alloy
C) to reduce the gold in the cyanide complex to gold metal
D) to precipitate the cyanide ion
E) to oxidize the gold in the cyanide complex to gold metal
Correct Answer:
Verified
Correct Answer:
Verified
Q1: Why is either pure oxygen or oxygen
Q2: In the Bayer process, the purpose of
Q3: A basic slag is needed in steelmaking
Q5: Part of the Bayer process involves the
Q6: Roasting HgS in the presence of oxygen
Q7: CuS has a very low solubility in
Q8: The product in the Hall electrometallurgical process
Q9: A mineral is<br>A) metal in its elemental
Q10: Which statement below is true?<br>A) Most metallic
Q11: The undesirable material that is separated from