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प्रश्न
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?
उत्तर १
An isotropic solid has the same value of physical properties when measured along different directions. Therefore, the given solid, having the same value of refractive index along all directions, is isotropic in nature. Hence, the solid is an amorphous solid.
When an amorphous solid is cut with a sharp edged tool, it cuts into two pieces with irregular surfaces.
उत्तर २
As the solid has same value of refractive index along all directions, it is isotropic in nature and hence amorphous. Being amorphous solid, it will not show a clean cleavage and when cut, it will break into pieces with irregular surfaces.
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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.
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Define the term 'amorphous'. Give a few examples of amorphous solids.
What makes a glass different from a solid such as quartz? Under what conditions could quartz be converted into glass?
Why does sodium chloride on heating with sodium vapours acquire yellow colour?
Which among the following is not an example of amorphous solids?
Amorphous solids are also known as ____________.
Most crystals show good cleavage because their atoms, ions or molecules are ____________.
A crystalline solid ____________.
Which of the following is not a crystalline solid?
Which of the following statements about amorphous solids is incorrect?
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 one of the following is non-crystalline or amorphous?
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.
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.
