Which of the following metals is extracted by | vedclass

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(A) The cyanide process,also known as the MacArthur-Forrest process,is primarily used for the extraction of precious metals like gold $(Au)$ and silve

Vedclass · Accepted Answer

$Ag$

Vedclass · Answer

(A) The cyanide process,also known as the MacArthur-Forrest process,is primarily used for the extraction of precious metals like gold $(Au)$ and silver $(Ag)$ from their ores.In this process,the crushed ore is treated with a dilute solution of sodium cyanide $(NaCN)$ in the presence of air (as a source of oxygen).For silver $(Ag)$,the chemical reaction is: $4Ag(s) + 8CN^-(aq) + 2H_2O(aq) + O_2(g) \rightarrow 4[Ag(CN)_2]^-(aq) + 4OH^-(aq)$.Thus,$Ag$ is extracted using the cyanide process.

$I$ (Method)	$II$ (Ore)
$(I)$ Magnetic separation	$a. Cu_2S$
$(II)$ Froth flotation	$b. FeCr_2O_4$
$(III)$ Gravity separation	$c. Al_2(SiO_3)_3$

Which of the following metals is extracted by the cyanide process (leaching)?

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Match the method of concentration of ore in Column $I$ with the ore in Column $II$.

$I$ (Method) $II$ (Ore)

$(I)$ Magnetic separation $a. Cu_2S$

$(II)$ Froth flotation $b. FeCr_2O_4$

$(III)$ Gravity separation $c. Al_2(SiO_3)_3$

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