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NCERT Class XII Chemistry
Chapter - The Solid State
Questions with Solutions

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Question : 29
Total: 50
Classify the following as amorphous or crystalline solids: Polyurethane, naphthalene, benzoic acid, teflon, potassium nitrate, cellophane, polyvinyl chloride, fibre glass, copper.
Solution:  
Amorphous solids : Polyurethane, teflon, cellophane, polyvinylchloride and fibre glass
Crystalline solids : Naphthalene, benzoic acid, potassium nitrate andcopper
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