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Manipal MET2014ChemistryGeneral Principles and Processes of Isolation of Metals

Gold is extracted by hydrometallurgical process, based on its property

Options

  1. Aof being electropositive
  2. Bof being less reactive
  3. Cto form complexes which are water soluble
  4. Dto form salts which are water soluble

Correct answer

C. to form complexes which are water soluble

Step-by-step solution

4 Au ( s )+8 CN ⁻+ O ₂(g)+2 H ₂ O soluble complex 4 [ Au ( CN )₂ ] +4 OH ⁻

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