The Ellingham diagram is a graphical representation of

Which of the following is electrolyzed for the extraction of aluminum?

In the MacArthur-Forrest process,which element is used to extract silver from the solution of $Na[Ag(CN)_2]$?

Carbon reduction is not used to obtain $Cr$ and $Mn$ because

Given below are two statements: one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R).$
Assertion $(A):$ Aluminium is extracted from bauxite by the electrolysis of a molten mixture of $Al_2O_3$ with cryolite.
Reason $(R):$ The oxidation state of $Al$ in cryolite is $+3$.
In the light of the above statements,choose the most appropriate answer from the options given below:

Which of the following processes involves smelting?