During the extraction of iron from hematite in a blast furnace,which substance is obtained as slag?

Which of the following methods is $NOT$ used for the concentration of an ore?

During the electrolytic refining of zinc,it gets

Give reasons: Carbonate and sulphide ores are usually converted into oxides during the process of extraction.

Which furnace is used to extract iron metal from its ore?

$(a)$ List two differences between calcination and roasting in tabular form.
$(b)$ Which method will you use to reduce the following? Explain by giving a suitable example.
$(i)$ Oxides of less reactive metals.
$(ii)$ Oxides of moderately reactive metals.
$(iii)$ Oxides of highly reactive metals.