Consider two chemical reactions $(A)$ and $(B)$ that take place during metallurgical process:

$(A)$ $\mathrm{ZnCO}_{3(\mathrm{~s})} \longrightarrow \mathrm{A}{\longrightarrow} \mathrm{ZnO}_{(\mathrm{s})}+\mathrm{CO}_{2(\mathrm{~g})}$

$(B)$ $2 \mathrm{ZnS}_{(\mathrm{s})}+3 \mathrm{O}_{2(\mathrm{~g})} \longrightarrow \mathrm{ZnO}_{(\mathrm{s})}+2 \mathrm{SO}_{2(\mathrm{~g})}$

The correct option of names given to them respectively is:

Consi der the following metallurgical processes

$(I)$ Heating impure metal with $CO$ and distilling the resulting volatile carbonyl (b.p. $43\,^oC$ ) and finally decomposition at $150^o-200\,^oC$ to get the pure metal

$(II)$ Heating the sulphide ore in air until a part is converted to oxide and then further heating in the absence of air to let the oxide react with unchanged metal sulphide

$(III)$ Electrolysis of the molten electrolyte containing approximately equal amounts of the metal chloride and $NaCl$ to obtained the metal

The processes used for obtaining magnesium, nickel and copper are respectively

Which is not correctly matched

The metal for which, its property of formation of volatile complex is taken in account for its extraction is

Rusting of iron is catalyzed by which of the following?