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प्रश्न
Classify the following as amorphous or crystalline solids:
Polyurethane, naphthalene, benzoic acid, teflon, potassium nitrate, cellophane, polyvinyl chloride, fibre glass, copper.
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उत्तर
| Amorphous solids | Crystalline solids |
| Polyurethane | Naphthalene |
| Teflon | Benzoic acid |
| Cellophane | Potassium nitrate |
| Polyvinyl chloride | Copper |
| Fibre glass |
संबंधित प्रश्न
What is the hybridisation of carbon atom in diamond and graphite?
Why are solids rigid?
Why do solids have a definite volume?
Why is glass considered a super cooled liquid?
Define the term ‘amorphous’.
Write any two differences between amorphous solids and crystalline solids
“Crystalline solids are anisotropic in nature″. What is the meaning of anisotropic in the given statement?
Which of the following is not a crystalline solid?
Which of the following statements about amorphous solids is incorrect?
Which of the following is an amorphous solid?
Which one of the following is non-crystalline or amorphous?
Which of the following is true about the value of refractive index of quartz glass?
Amorphous solid can also be called:
(i) pseudo solids
(ii) true solids
(iii) supercooled liquids
(iv) supercooled solids
Which of the following features are not shown by quartz glass?
(i) This is a crystalline solid.
(ii) Refractive index is same in all the directions.
(iii) This has definite heat of fusion.
(iv) This is also called super cooled liquid.
Under which situations can an amorphous substance change to crystalline form?
The property of crystalline solid is not ______.
Assertion A: Sharp glass edge becomes smooth on heating it upto its melting point.
Reason R: The viscosity of glass decreases on melting.
Choose the most appropriate answer from the options given below.
