Which among the following is a nonferrous alloy?

The smelting of iron in the blast furnace involves all the following processes except:

Among the reactions $(a) - (d)$,the reaction$(s)$ that does/do not occur in the blast furnace during the extraction of iron is/are:
$(a)$ $CaO + SiO_2 \rightarrow CaSiO_3$
$(b)$ $3 Fe_2O_3 + CO \rightarrow 2 Fe_3O_4 + CO_2$
$(c)$ $FeO + SiO_2 \rightarrow FeSiO_3$
$(d)$ $FeO \rightarrow Fe + \frac{1}{2} O_2$

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.

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

Given below are two statements related to Ellingham diagram:
Statement-$I$ : Ellingham diagrams can be constructed for formation of oxides,sulfides and halides of metals.
Statement-$II$ : It consists of plots of $\Delta_f H^0$ vs $T$ for formation of oxides of elements.
In the light of the above statements,choose the most appropriate answer from the options given below: