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प्रश्न
Which of the following statement is not true about amorphous solids?
विकल्प
On heating they may become crystalline at certain temperature.
They may become crystalline on keeping for long time.
Amorphous solids can be moulded by heating.
They are anisotropic in nature.
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उत्तर
They are anisotropic in nature.
Explanation:
Amorphous solids are isotropic because they show thermal and optical properties, same in all directions.
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संबंधित प्रश्न
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Amorphous solids are also known as ____________.
Most crystals show good cleavage because their atoms, ions or molecules are ____________.
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Which of the following statements about amorphous solids is incorrect?
The sharp melting point of crystalline solids is due to ______.
Which one of the following is non-crystalline or amorphous?
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?
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.
