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NTA Abhyas NEET2020ChemistryGeneral Principles and Processes of Isolation of MetalsPractice

Native silver metal forms a water soluble complex with a dilute aqueous solution of NaCN in the presence of

Options

  1. ANitrogen
  2. BOxygen
  3. CCarbon dioxide
  4. DArgon

Correct answer

B. Oxygen

Step-by-step solution

4 A g + 8 N a C N + O 2 + 2 H 2 O ⟶ 4 N a A g C N 2 + 4 N a O H Ag react with NaCN in the presence of air, and forms sodium argentocyanide.

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