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

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

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

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

The process of the isolation of a metal by dissolving the ore in a suitable chemical reagent followed by precipitation of the metal by a more electropositive metal is called:

The form of iron obtained from blast furnace is

For a reversible reaction $A \rightleftharpoons B$, the $\Delta H _{\text {forward }}$ reaction $=20\,kJ\,mol ^{-1}$. The activation energy of the uncatalysed forward reaction is $300\,kJ\,mol ^{-1}$. When the reaction is catalysed keeping the reactant concentration same, the rate of the catalysed forward reaction at $27^{\circ}\,C$ is found to be same as that of the uncatalysed reaction at $327^{\circ}\,C$. The activation energy of the cataysed backward reactoion is $….\,kJ\,mol { }^{-1}$.

Which of the following reaction is common for both self reduction and carbon reduction when $Pb$ is extracted from galena