Blister copper is

Extraction of zinc from zinc blende is achieved by

When alumina is heated with carbon in nitrogen atmosphere, the products are

In the leaching of alumina from bauxite, the ore expected to leach out in the process by reacting with $\mathrm{NaOH}$ is:

Which process of purification is represented by the following equation

$\mathop {Ti{\mkern 1mu} }\limits_{{\text{(Impure)}}} {\text{  +  2}}{{\text{I}}_2}\xrightarrow{{250{{\kern 1pt} \,^o}C}}$ ${\text{Ti}}{{\text{I}}_4}\xrightarrow{{1400{{\kern 1pt} \,^o}C}}\mathop {{\text{Ti}}}\limits_{{\text{(Pure) }}} {\text{  +   2}}{{\text{I}}_2}$