Name every metallurgical operation with an example, run Down's cell, Castner-Kellner and Solvay from memory, split d-orbitals in an octahedral field, and write the blast-furnace reactions zone by zone.
Unit 2 carries 10 of the 50 chemistry marks; with three chapters sharing them, this one averages a little over three (MEC publishes weights by unit, not by chapter). It is the largest block of pure recall in the chemistry paper, and the recall is cheap — a glossary, a dozen named processes with their conditions, and four compounds.
The MEC scope runs in seven lines, from metallurgical principles: hydro-, pyro- and electrometallurgy; ores, gangue, flux, slag; concentration, calcination, roasting, smelting, bessemerisation, aluminothermy, electrochemical reduction, poling, electro-refining, zone refining through the s-block, the 3d series and complex ions to the five metals, the four named compounds, steel and corrosion of iron. Three ways it is asked:
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