The slag consists of molten impurities generally in the form of

In the metallurgical extraction of zinc from $ZnO$,the reducing agent used is:

According to the Ellingham diagram,at lower temperatures,the oxidation of $C$ to $CO$ is useful for the reduction of which of the following?

Which process of reduction of mineral to the metal is suited for the extraction of copper from its ores with low copper content?

In the process of extraction of gold,roasted gold ore reacts as follows. Identify the complexes $[X]$ and $[Y]$:
$\text{Roasted gold ore} + CN^{-} + H_2O \xrightarrow{O_2} [X] + OH^{-}$
$[X] + Zn \to [Y] + Au$

The element which is recovered from an electrolytic process is: