4 Ag_{(s)} + 8 CN^{-}_{(aq)} + 2 H_2O_{(l)} + | vedclass

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(A) The given reaction is an example of cyanide leaching,which is used for the extraction of metals like $Ag$ and $Au$ from their ores.In this process

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Leaching

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(A) The given reaction is an example of cyanide leaching,which is used for the extraction of metals like $Ag$ and $Au$ from their ores.In this process,the ore is treated with a suitable reagent (like $NaCN$ or $KCN$) to dissolve the metal in the form of a complex.Levigation is a gravity separation process based on the difference in densities of the ore and gangue.Froth flotation is a physical process used primarily for sulphide ores.Liquation is a refining process used for metals with low melting points.

$4 Ag_{(s)} + 8 CN^{-}_{(aq)} + 2 H_2O_{(l)} + O_{2(g)} \longrightarrow 4 [Ag(CN)_2]^{-}_{(aq)} + 4 OH^{-}_{(aq)}$
The above reaction represents the process of concentration of ore in the extraction of silver. This process is:

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$4 Ag_{(s)} + 8 CN^{-}_{(aq)} + 2 H_2O_{(l)} + O_{2(g)} \longrightarrow 4 [Ag(CN)_2]^{-}_{(aq)} + 4 OH^{-}_{(aq)}$The above reaction represents the process of concentration of ore in the extraction of silver. This process is: