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प्रश्न
Write any two differences between amorphous solids and crystalline solids
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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.
Why is glass considered a super cooled liquid?
Refractive index of a solid is observed to have the same value along all directions. Comment on the nature of this solid. Would it show cleavage property?
‘Stability of a crystal is reflected in the magnitude of its melting points.’ Comment. Collect melting points of solid water, ethyl alcohol, diethyl ether and methane from a data book. What can you say about the intermolecular forces between these molecules?
Amorphous solids are also known as ____________.
The sharp melting point of crystalline solids is due to ______.
Which of the following amorphous solid is used as photovoltaic material for conversion of sunlight into electricity?
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.
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.
