Which of the following ores is concentrated b | vedclass

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(D) Leaching is a process of extraction where the ore is treated with a suitable reagent which dissolves the ore but not the impurities. $1$. Gold $(A

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All of the above

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(D) Leaching is a process of extraction where the ore is treated with a suitable reagent which dissolves the ore but not the impurities. $1$. Gold $(Au)$ and Silver $(Ag)$ are extracted by leaching with dilute solutions of $NaCN$ or $KCN$ in the presence of air $(O_2)$. $2$. Aluminum $(Al)$ is extracted from bauxite ore $(Al_2O_3 \cdot 2H_2O)$ by leaching with a concentrated solution of $NaOH$ (Bayer's process). Since all three metals are extracted using leaching,the correct answer is $D$.

Which of the following ores is concentrated by the leaching process?

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