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

(A) CaO

(B) FeO

(C) Al₂O₃

(D) ZnO

(E) NiO

Choose the correct answer from the options given below:

Match List I with List II.

Choose the correct answer from the options given below :

In isolation of which one of the following metals from their ores, the use of cyanide salt is not commonly involved?

In the metallurgical extraction of copper, following reaction is used :

FeO + SiO₂ $$\to$$ FeSiO₃

FeO and FeSiO₃ respectively are.