A student concludes that a substance with poor conductivity in the solid state but good conductivity when melted must be a network covalent solid. What mistake did the student make?
A.
All network covalent solids conduct electricity when melted.
B.
Poor conductivity in solid state is characteristic of all solids, including network covalent.
C.
The student made no mistake; network covalent solids conduct when melted.
D.
Ionic compounds, not network covalent solids, conduct electricity when melted due to free ions.
Exam No：AP Chemistry Problem Set 1 Year：2024 Question No：APChemistry2024AP0059
Answer:
D
Knowledge points:
2.7 VSEPR and Hybridization
3.1 Intermolecular and Interparticle Forces
3.3 Solids, Liquids, and Gases
Solution:
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