Ordinary glass is not a/an_________________?
Correct answer: C. Material with sharp definite melting point
- A. Amorphous isotropic material
- B. Supercooled liquid
- C. Material with sharp definite melting point
- D. Electrical insulator
Explanation
Ordinary glass is amorphous, isotropic and electrically insulating, and it softens over a temperature range rather than having a sharp melting point. Calling it a supercooled liquid is a common simplified description, but the absence of a definite melting point is the clear distinguishing statement.
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