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Question: Answered & Verified by Expert
In the cyanide extraction process of silver from argentite ore, the oxidizing and reducing agents used are
ChemistryGeneral Principles and Processes of Isolation of MetalsNEET
Options:
  • A HNO3 and CO respectively
  • B HNO3 and Zn dust respectively
  • C O2 and Zn dust respectively
  • D O2 and CO respectively.
Solution:
2880 Upvotes Verified Answer
The correct answer is: O2 and Zn dust respectively
In the cyanide extraction process of silver from argentite ore, the oxidizing and reducing agents used are O2 and Zn dust respectively.
Ag 2 S+2 CN − + O 2 →2 Ag (CN) 2 − + SO 2
2 Ag (CN) 2 − +Zn→ Zn (CN) 4 2− +2Ag

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