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Q. |
Lead-oxide glass is called “crystal glass” because: |
A. | it contains crystalline pb |
B. | it contains sio2 crystals |
C. | it contains pbo crystals |
D. | none of the mentioned |
Answer» D. none of the mentioned | |
Explanation: well, crystal glass is amorphous, not crystalline. this glass earns its name from its excellent decorative properties and high refractive index. |
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