Which of the following statement(s) is / are incorrect ?

In the leaching of $Ag_2S$ with $NaCN,$ a stream of air is also passed. It is because of

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:

In the aluminothermite process aluminium acts as

The compound(s) that is(are) removed as slag during the extraction of copper is.

$(1)$ $CaO$    $(2)$ $FeO$   $(3)$ $Al _{2} O _{3}$    $(4)$ $ZnO$      $(5)$ $NiO$

Choose the correct answer from the options given below.