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KVPY2011ChemistryGeneral Principles and Processes of Isolation of Metals

Extraction of silver is achieved by initial complexation of the ore (Argentite) with X followed by reduction with Y. X and Y respectively are

Options

  1. ACN ⁻ and Zn
  2. BBr ⁻ and Zn
  3. CCl ⁻ and Zn
  4. DNone of these

Correct answer

A. CN ⁻ and Zn

Step-by-step solution

Complexation step array r Ag ₂ ~S + CN ^ [ Ag ( CN )₂ ]⁻+ S ⁻² + Zn Reduction step [ Zn ( CN )₄ ]⁻²+ Ag array

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