Consider the following reactions at $1000\,^oC$

$(I)$  $Zn(s){\mkern 1mu}  + {\mkern 1mu} 1/2{\mkern 1mu} {O_2}(g){\mkern 1mu} \xrightarrow{\Delta }{\mkern 1mu} ZnO(g){\mkern 1mu} ;$      $\Delta {G^o}{\mkern 1mu}  = \,{\mkern 1mu}  – \,{\mkern 1mu} 360\,{\mkern 1mu} {\mkern 1mu} kJ{\mkern 1mu} \,{\mkern 1mu} mo{l^{ – 1}}$

$(II)$  $C(s){\mkern 1mu}  + {\mkern 1mu} 1/2{\mkern 1mu} {O_2}(g){\mkern 1mu} \xrightarrow{\Delta }{\mkern 1mu} CO(g){\mkern 1mu} ;$      $\Delta {G^o}{\mkern 1mu}  = {\mkern 1mu}  – \,{\mkern 1mu} 460{\mkern 1mu} {\mkern 1mu} \,kJ{\mkern 1mu} {\mkern 1mu} mo{l^{ – 1}}$

and choose the correct statement at $1000\,^oC$

Ellingam diagram represents

The purest form of commercial iron is

Iron obtained from blast furance is:

A solution of $Na_2SO_4$ in water is electrolysed using inert electrodes. The products at cathode and anode are respectively