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Bauxite: Quiz


Question 1: The gibbsite is usually converted into ________, Al2O3, by heating.
AluminiumAluminium oxideAluminium chlorideAluminium hydroxide

Question 2: The lateritic bauxites are found mostly in the countries of the tropics.They were formed by lateritization (see laterite) of various silicate rocks such as granite, gneiss, ________, syenite, and shale.
Flood basaltBasaltIgneous rockLava

Question 3: In 2007, ________ was one of the top producers of bauxite with almost one-third of the world's production, followed by China, Brazil, Guinea, and Jamaica.
CanadaUnited KingdomBarbadosAustralia

Question 4: Before Hall and Heroult discovered their process that uses cryolyte and ________, aluminum was separated from its ore - in small quantities - by heating the ore with metallic sodium or potassium in a vacuum.
ElectromagnetismElectricityElectric chargeElectric current

Question 5: At these temperatures, the ________ is dissolved as an aluminate (the Bayer process).

Question 6: Lateritic bauxites (silicate bauxites) are distinguished from ________ bauxites (carbonate bauxites).
Show caveCaveMine explorationKarst topography

Question 7: Approximately 95% of the world's bauxite production is processed first into ________, and then into aluminum by electrolysis.
Aluminium oxideAluminium chlorideAluminiumAluminium hydroxide

Question 8: Bauxite was named after the village Les Baux in southern ________, where it was first recognized as containing aluminum and named by the French geologist Pierre Berthier in 1821.
United KingdomItalyCanadaFrance

Question 9: Bauxite is usually strip mined (________) because it is almost always found near the surface of the terrain, with little or no overburden.
QuarryOpen-pit miningMountaintop removal miningSurface mining


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