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Question
Extraction of gold and silver involves leaching with cyanide ion. silver is later recovered by
Options
Distillation
Zone refining
Displacement with zinc
liquation
Solution
Displacement with zinc
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\[\ce{Zr (impure) + 2I2 ->[523 K] ZrI4}\]
\[\ce{ZrI4 ->[1800 K] Zr (pure) + 2I2}\]
This method is known as
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