The metal extracted by the electrolysis of its fused salt is

The element which could be extracted by electrolytic reduction of its oxide dissolved in a high temperature melt is:

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 point of intersection and sudden increase in the slope,in the diagram given below,respectively,indicates

The Bessemer converter is used in the manufacture of:

Bessemerization is used in the extraction of