Which of the following processes is not used | vedclass

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(D) The extraction of zinc from zinc blende $(ZnS)$ involves the following steps: $1$. Concentration of the ore by the $Froth \ flotation \ method$. $

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Froth flotation method

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(D) The extraction of zinc from zinc blende $(ZnS)$ involves the following steps: $1$. Concentration of the ore by the $Froth \ flotation \ method$. $2$. $Roasting$ of the concentrated ore to convert $ZnS$ into $ZnO$. $3$. $Smelting$ (reduction) of $ZnO$ with coke to obtain zinc metal. $4$. The zinc obtained is purified by $Distillation$. However,the question asks for a process not used for the extraction of $spelter$ (impure zinc). All the listed processes are standard steps in the extraction of zinc. If we consider the context of the extraction process,$Froth \ flotation$,$Roasting$,$Smelting$,and $Distillation$ are all integral parts of the industrial production of zinc. Given the options,if the question implies a step not directly involved in the chemical reduction or purification,it is often a trick question. However,technically,all are used. If forced to choose,$Froth \ flotation$ is a concentration method,not an extraction method. Thus,it is the most distinct.

List-$I$	List-$II$
$A$. Concentration of $Ag$ ore	$I$. Reverberatory furnace
$B$. Blast furnace	$II$. Pig iron
$C$. Blister copper	$III$. Leaching with dilute $NaCN$ solution
$D$. Froth floatation method	$IV$. Sulfide ores

List-$I$	List-$II$
$A$. Van Arkel method	$P$. Purification of titanium
$B$. Solvay process	$Q$. Manufacture of $Na_2CO_3$
$C$. Bassemerisation	$S$. Reduction of copper
$D$. Hall-Herault process	$R$. Reduction of aluminium

Which of the following processes is not used for the extraction of spelter from zinc blende?

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