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The method of extraction of Ag by cyano complex formation followed by metal displacement is called

1. Parke's method
2. McArthur-Forest method
3. serpeck method
4. Hall's method

Correct answer: Parke's method

Solution

In Parke's method, silver is extracted by forming a soluble cyanide complex and then precipitated/recovered by displacement with a more reactive metal. This is the classic cyanide-leaching and metal-displacement route used for silver extraction.

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