Chemistry Solids UHS 2022
PMDC Verified Question 32 of 54
A small building block which belongs to whole information about crystal structure is called?
A
Cell
B
Crystal lattice
C
Unit cell
D
Crystal unit
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Unit cell
Concept:
Crystals are constructed by stacking identical geometric structural blocks in three dimensions.

Solution:
  • The smallest representative building block that holds all the symmetry and proportional structural information of the entire crystal lattice is called the unit cell.


Why other options are incorrect:
  • B: The crystal lattice is the entire macroscopic 3D framework, not the small building block.
  • A, D: These are incomplete or non-standard terms in solid-state chemistry.

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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