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NTA Abhyas NEET2020ChemistryGeneral Principles and Processes of Isolation of MetalsPractice

In the cyanide extraction process of silver from argentite ore, the oxidizing and reducing agents used are

Options

  1. AH N O 3 and CO respectively
  2. BH N O 3 and Zn dust respectively
  3. CO 2 and Zn dust respectively
  4. DO 2 and CO respectively.

Correct answer

C. O 2 and Zn dust respectively

Step-by-step solution

In the cyanide extraction process of silver from argentite ore, the oxidizing and reducing agents used are O 2 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 − + 2 Ag

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