The substance used in the thermite process of reducing metal ores is

In the electrolytic extraction of $Al$,molten cryolite $(Na_3AlF_6)$ is used because it .......

Consider the following reactions of metallurgy:
Ore '$X$' $\xrightarrow{\text{Roasting}}$ '$Y$' + $SO_2$ $\uparrow$
Ore '$Z$' $\xrightarrow{\text{Calcination}}$ '$Y$' + $CO_2$ $\uparrow$
'$Y$' + $C$ $\xrightarrow{1673 \ K}$ '$A$' (vapour) + '$B$' $(g)$
where '$A$' and '$B$' are respectively:

Which one of the following organizations' iron and steel plant was built to use charcoal as a source of power,to start with,but later switched over to hydroelectricity?

Observe the following Ellingham diagram,and identify the incorrect statement regarding it.

Carbon cannot be used to produce magnesium by chemical reduction of $MgO$ because