Which of the following is NOT an extraction p | vedclass

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(D) The Parke's process is a metallurgical process for removing silver from lead.Electrolytic refining is a standard method for the purification of me

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By heating $Na[Ag(CN)_2]$

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(D) The Parke's process is a metallurgical process for removing silver from lead.Electrolytic refining is a standard method for the purification of metals like $Cu$,$Ni$,$Pb$,$Au$,and $Ag$,where silver is often recovered as anode mud.The extraction of silver from silver sulphide $(Ag_2S)$ involves the following reactions:$Ag_2S + 4NaCN \rightarrow 2Na[Ag(CN)_2] + Na_2S$ (reversible reaction)$2Na[Ag(CN)_2] + Zn \rightarrow Na_2[Zn(CN)_4] + 2Ag$However,heating $Na[Ag(CN)_2]$ does not yield metallic silver $(Ag)$ directly as it decomposes into complex products rather than simple metallic silver.Therefore,option $D$ is the correct answer.

Which of the following is $NOT$ an extraction process for silver?

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