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Which of the following is an amorphous solid?
AGlass
BSodium chloride
CDiamond
DQuartz
Answer & Solution
Correct answer: A. Glass
1. Crystalline solids have a long-range repeating arrangement of constituent particles.
2. Amorphous solids lack such long-range order and have only short-range structure.
3. Glass is an amorphous solid; NaCl, diamond and quartz are all crystalline.
_Source: Maharashtra Balbharati Std XII Chemistry, Ch 1 "Solid State" §1.2_
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