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NTA Abhyas NEET2020ChemistryGeneral Principles and Processes of Isolation of MetalsPractice

Leaching of A g 2 S is carried out by heating it with dilute solution of

Options

  1. ANaCN only
  2. BHCl
  3. CNaOH
  4. DNaCN in presence of O 2

Correct answer

D. NaCN in presence of O 2

Step-by-step solution

Leaching of A g 2 S is carried out by heating it with dilute solution of NaCN in presence of O 2 . A g 2 S + 4 N a C N → A i r 2 N a [ A g CN 2 ] + N a 2 S 2 Na [ Ag CN 2 ] + Zn dust → Na 2 [ Zn CN 4 ] + 2 Ag ↓

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