Chemistry Solids UHS 2024
PMDC Verified Question 3 of 54
In graphite the carbon atoms are arranged in which of the following structure?
A
Rhombic
B
Hexagonal
C
Tetragonal
D
Trigonal
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Hexagonal
Concept:
Graphite is an allotrope of carbon defined by a specific 2D layered geometry resulting from \( \text{sp}^2 \) hybridization.

Solution:
  • In graphite, every carbon atom undergoes \( \text{sp}^2 \) hybridization and forms three sigma bonds with neighboring carbon atoms in the same plane.
  • This bonding arrangement creates flat, contiguous 2D sheets composed of interlocking six-membered rings.
  • This structure is geometrically described as a hexagonal array or hexagonal honeycomb structure.


Why other options are incorrect:
  • A, C, D: These refer to different 3D crystal systems or geometries that do not match the flat, 120-degree bonded rings found in graphite sheets.

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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