Chemistry S & P Block Elements UHS 2023
PMDC Verified Question 25 of 104
Select the metal which is extracted from bauxite?
A
Al
B
Ca
C
Mg
D
Cu
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Al
Concept:

Metals are often extracted from naturally occurring mineral ores that contain high concentrations of specific metal compounds.

Solution:

  • Bauxite is a sedimentary rock and the world's primary source for one specific metal.
  • Chemically, Bauxite is composed largely of hydrated aluminum oxides (such as \( \text{Al}_2\text{O}_3 \cdot n\text{H}_2\text{O} \)).
  • The extraction process involves refining bauxite into pure alumina (Bayer process), which is then subjected to electrolysis (Hall-Héroult process) to produce pure Aluminum (Al) metal.


Why other options are incorrect:

  • Ca: Extracted from limestone/calcite (\( \text{CaCO}_3 \)).
  • Mg: Extracted from seawater or ores like dolomite/magnesite.
  • Cu: Extracted from ores like chalcopyrite (\( \text{CuFeS}_2 \)).

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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