In the metallurgy of aluminium,

Which of the following statements regarding the metallurgy of aluminium by electrolytic method is not correct?

Answer the Following: (i) What si the role of cryolite in the metallurgy of aluminium? (ii) Differentiate between roasting and calcination. (iii) What is meant by the term 'chromatography'? OR Write the reaction taking place in different zones of the blast furnace to obtain Iron.

(a) Suggest a condition under which magnesium could reduce alumina. (b) Although thermodynamically feasible, in practice magnesium metal is not used for the reduction of alumina in the metallurgy of aluminium. Why ? ( c) What is the reduction of a metal oxide easier if the metal formed is in liquid state at the temperature of reduction ? (d) At a site, low grade copper ores oare available and zinc and iron scraps are also available. Which of the two scraps would be more suitable for reducing the leached copper ore and why ?

Explain the following:Role of cryolite In metallurgy of aluminium.

Which of the following statement(s) is/are correct for the extractive metallurgy of aluminium?

What is the role of CO_(2) in the extractive metallurgy of aluminium from its ore ?

What is the role of CO_(2) in the extractive metallurgy of aluminium from its ore ?