Metallurgy

Step 1: Recall methods for converting ores to oxides.
Metal extraction often involves converting ores to oxides.
Step 2: Define the given processes.
Calcination:
Heating carbonate ores in limited air to form oxides and release .
Electrolysis:
Using electricity to drive non-spontaneous reactions.
Roasting:
Heating sulfide ores in excess air to form oxides and .
Smelting:
Reducing metal oxides at high temperatures.
Step 3: Identify the process for carbonate ores in limited air.
Calcination fits the description provided in the question.

Step 1: Recall common metal ores.
Ores are minerals from which metals are economically extracted.
Step 2: Identify the chemical composition of the options.
Hematite: (Iron ore) Cinnabar: (Mercury ore) Galena: (Lead ore) Bauxite: (Aluminium ore)
Step 3: Match the ore to mercury.
Cinnabar is the ore of mercury.