In the alumino-thermite process,aluminium is used as:

Steel differs from pig iron and wrought iron in that it contains

Which technique is used in the manufacture of aluminium from bauxite?

Which of the following is an acidic flux?

Explain the role of thermodynamics in the extraction of elements. Or,explain how thermodynamics is helpful in the selection of a reducing agent for metallurgical operations.

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