The iron obtained from the blast furnace is called

After froth flotation,copper sulfide is reduced by.........

Aluminium is produced on a large scale by electrolysis of alumina,dissolved in fused cryolite and a little fluorspar. These two electrolytes,cryolite and fluorspar are respectively

Limestone is present in the blast furnace production of iron in order to
$(I)$ provide a source of $CaO$
$(II)$ remove some impurities
$(III)$ supply $CO_2$

During the extraction of iron,the slag produced is:

In the aluminothermite process,aluminium acts as: