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(B) $I.$ Cyanide process is used for the extraction of $Au$ (Gold) and $Ag$ (Silver).$II.$ Froth Floatation process is used for the concentration of s

Vedclass · Accepted Answer

$I-(4), II-(2), III-(3), IV-(1)$

Vedclass · Answer

(B) $I.$ Cyanide process is used for the extraction of $Au$ (Gold) and $Ag$ (Silver).$II.$ Froth Floatation process is used for the concentration of sulphide ores like $HgS$ (Cinnabar).$III.$ Electrolytic reduction is used for the extraction of highly reactive metals like $Al$ (Aluminium).$IV.$ Zone refining is used for the purification of semiconductors like $Ge$ (Germanium) and $Si$ (Silicon).Therefore,the correct matching is $I-(4), II-(2), III-(3), IV-(1)$.

List-$I$	List-$II$
$I.$ Cyanide process	$(1)$ Ultrapure $Ge$
$II.$ Floatation process	$(2)$ Dressing of $HgS$
$III.$ Electrolytic reduction	$(3)$ Extraction of $Al$
$IV.$ Zone refining	$(4)$ Extraction of $Au$

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