Chemistry Solids BUMHS 2022
PMDC Verified Question 39 of 54
Amorphous solids?
A
Have perfect arrangement of atoms
B
Have sharp Melting point
C
Can possesses small regions of orderly arrangement of atoms
D
Undergo clean cleavage when cut with knife
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Can possesses small regions of orderly arrangement of atoms
Concept:
Amorphous solids (like glass or plastic) lack a long-range, perfectly ordered internal structure, differentiating them from crystalline solids.

Solution:
  • While amorphous solids are generally disordered, they are not always 100% chaotic.
  • They can contain microscopic, localized pockets where atoms temporarily align in an orderly fashion.
  • These tiny, ordered crystalline regions scattered throughout the amorphous bulk are known as crystallites.
  • Therefore, amorphous solids can possess small regions of orderly arrangement.


Why other options are incorrect:
  • A, B, D: Perfect long-range arrangement, sharp melting points, and clean, planar cleavage are all exclusive properties of true crystalline solids, not amorphous solids.

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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