Among K,Mg,Au,and Cu,the one which is extract | vedclass

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(D) The correct option is $D$.Metals with low reactivity are often extracted by heating their sulfide ores in the presence of air,a process known as r

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$Cu$

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(D) The correct option is $D$.Metals with low reactivity are often extracted by heating their sulfide ores in the presence of air,a process known as roasting.Among the given metals,$Cu$ (Copper) is extracted from its sulfide ore $(Cu_2S)$ by heating it in air.$2Cu_2S + 3O_2 \rightarrow 2Cu_2O + 2SO_2 \uparrow$$K$ and $Mg$ are highly reactive and are extracted by electrolysis of their molten salts.$Au$ is a noble metal and is typically extracted using leaching processes (cyanide process).

Among $K$,$Mg$,$Au$,and $Cu$,the one which is extracted by heating its ore in air is

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