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Extraction of gold and silver involves l...

Extraction of gold and silver involves leaching the metal with `CN^-` ion. The metal is recovered by .............

A

displacement of metal by some other metal from the complex ion.

B

roasting of metal complex.

C

calcinations followed by roasting

D

thermal decomposition of metal complex.

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The correct Answer is:
A
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MODERN PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -Multiple Choice Questions - Level - II
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  15. The reduction of zinc oxide with coke occurs at temperature

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