Chemistry Solids UHS 2024
PMDC Verified Question 2 of 54
One of the following is NOT an example of amorphous solids:
A
Plastics
B
Glass
C
Glucose
D
Rubber
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Glucose
Concept:
Solids are broadly categorized as either crystalline (having a highly ordered, repeating internal 3D structure) or amorphous (lacking long-range order).

Solution:
  • Glucose (\( \text{C}_6\text{H}_{12}\text{O}_6 \)) forms true, well-defined molecular crystals with sharp melting points.
  • Because its molecules arrange themselves in a perfectly ordered repeating lattice, glucose is a crystalline solid.
  • Therefore, it is NOT an amorphous solid.


Why other options are incorrect:
  • A, B, D: Plastics, Glass, and Rubber are classic textbook examples of amorphous solids. Their internal structures are random and tangled, lacking a repeating geometric lattice.

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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