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प्रश्न
Write any two differences between amorphous solids and crystalline solids
उत्तर
| Crystalline solids | Amorphous solids |
| They have long range order i.e there is regular arrangement of molecules over a long distance. | They have short range order i.e there is regular arrangement of molecules over a short distance only. |
| They are anisotropic i.e the value of physical properties will be different when measured along different directions | They are isotropic i.e they will show same values of all physical properties when measured along different directions |
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संबंधित प्रश्न
Classify the following as amorphous or crystalline solids:
Polyurethane, naphthalene, benzoic acid, teflon, potassium nitrate, cellophane, polyvinyl chloride, fibre glass, copper.
Define the term 'amorphous'. Give a few examples of amorphous solids.
Why does sodium chloride on heating with sodium vapours acquire yellow colour?
Which of the following statements about amorphous solids is incorrect?
Which of the following is an amorphous solid?
Which of the following statement is not true about amorphous solids?
Why some glass objects from ancient civilisations are found to become milky in appearance?
Which of the following is true about the value of refractive index of quartz glass?
Under which situations can an amorphous substance change to crystalline form?
An ionic solid AB2 isomorphous to the rutile structure (a tetragonal system with the effective number of formula units = 2) has edge lengths of the unit cell of 4Å, 4Å and 7Å. The density of the substance is ______ mg/cc. (if its formula weight is 80. The NA = 6 × 1023 and express your answer in mg/cc using four significant digits.)
