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JEE Main202324 Jan 2023Evening ShiftChemistryGeneral Principles and Processes of Isolation of MetalsActual

The metal which is extracted by oxidation and subsequent reduction from its ore is :

Options

  1. AAl
  2. BAg
  3. CCu
  4. DFe

Correct answer

B. Ag

Step-by-step solution

Cyanide process, also called Macarthur-forrest Process, method of extracting silver and gold from their ores by dissolving them in a dilute solution of sodium cyanide or potassium cyanide. The following redox reaction takes place during the extraction process. 4 Ag + 8 CN - 1 + O 2 + 2 H 2 O → 4 [ Ag ( CN ) 2   ] + 4 OH - 2 Ag CN 2 - 1 + Zn → 2 Ag ↓ + Zn CN 4 - 2

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