Copper matte is composed of . . . . . .

Give the correct order of initials $T$ or $F$ for following statements. Use $T$ if statement is true and $F$ if it is false.
$(i)$ In Goldschmidt thermite process,aluminium acts as a reducing agent.
$(ii)$ $Mg$ is extracted by electrolysis of aqueous solution of $MgCl_2$.
$(iii)$ Extraction of $Pb$ is possible by carbon reduction method.
$(iv)$ Red Bauxite is purified by Serpeck's process.

Railway wagon axles are made by heating iron rods embedded in charcoal powder. This process is known as:

$A$ piece of steel is heated until redness and then plunged into cold water or oil. This treatment of iron makes it:

What is known as Thomas slag?

Which of the following reactions does not occur in the Bessemer converter?