BPSC (Bihar) Exam > BPSC (Bihar) Questions > Amorphous materials area)in which atom align ...
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Amorphous materials are
- a)in which atom align themselves in geometric pattern
- b)in which there is no definite atomic structure and atoms exist in a random pattern just as in liquid
- c)which is not attracted by phosphorous
- d)which emits fumes
- e)None of the above/ More than one of the above
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
Amorphous materials area)in which atom align themselves in geometric p...
Amorphous material:
- Amorphous materials are in which there is no definite atomic structure and atoms exist in a random pattern just as in a liquid.
- An amorphous material (AM) has a non-crystalline structure that differs from that of its iso-chemical liquid and does not undergo structural relaxation and the glass transition when heated. Examples are Glass, Gels, plastics, various polymers, wax, and thin films.
- The terms amorphous and non-crystalline are synonymous under this definition. The term glassy has the same structural meaning, but besides it also usually implies that the material exhibits a ‘glass transition’. Although the presence of dynamic disorder in the case of liquids complicates matters, the average atomic structure of liquids can be described in similar ways to that of amorphous solids.
- Amorphous alloys are a class of metal alloys that, unlike ordinary metals do not have a long-range crystal structure.
- Amorphous alloys have no grain boundaries.
Properties of Amorphous Solids:
Amorphous solids are sometimes described as supercooled liquids because their molecules are arranged randomly somewhat as in a liquid state.
Amorphous solids are sometimes described as supercooled liquids because their molecules are arranged randomly somewhat as in a liquid state.
- Lack of long-range order: Amorphous Solid does not have a long-range order of arrangement of their constituent particles. However, they may possess small regions of orderly arrangement. These crystalline parts of an otherwise amorphous solid are known as crystallites.
- No sharp melting point: An amorphous solid does not have a sharp melting point but melts over a range of temperatures. For example, glass on heating first softens and then melts over a temperature range. Glass, therefore, can be molded or blown into various shapes. Amorphous solid does not possess the characteristic heat of fusion.
- Conversion into a crystalline form: Amorphous solid, when heated and then cooled slowly by annealing, becomes crystalline at some temperature. That is why glass objects of ancient times look milky because some crystallization has taken place.
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Amorphous materials area)in which atom align themselves in geometric p...
Amorphous material:
- Amorphous materials are in which there is no definite atomic structure and atoms exist in a random pattern just as in a liquid.
- An amorphous material (AM) has a non-crystalline structure that differs from that of its iso-chemical liquid and does not undergo structural relaxation and the glass transition when heated. Examples are Glass, Gels, plastics, various polymers, wax, and thin films.
- The terms amorphous and non-crystalline are synonymous under this definition. The term glassy has the same structural meaning, but besides it also usually implies that the material exhibits a ‘glass transition’. Although the presence of dynamic disorder in the case of liquids complicates matters, the average atomic structure of liquids can be described in similar ways to that of amorphous solids.
- Amorphous alloys are a class of metal alloys that, unlike ordinary metals do not have a long-range crystal structure.
- Amorphous alloys have no grain boundaries.
Properties of Amorphous Solids:
Amorphous solids are sometimes described as supercooled liquids because their molecules are arranged randomly somewhat as in a liquid state.
Amorphous solids are sometimes described as supercooled liquids because their molecules are arranged randomly somewhat as in a liquid state.
- Lack of long-range order: Amorphous Solid does not have a long-range order of arrangement of their constituent particles. However, they may possess small regions of orderly arrangement. These crystalline parts of an otherwise amorphous solid are known as crystallites.
- No sharp melting point: An amorphous solid does not have a sharp melting point but melts over a range of temperatures. For example, glass on heating first softens and then melts over a temperature range. Glass, therefore, can be molded or blown into various shapes. Amorphous solid does not possess the characteristic heat of fusion.
- Conversion into a crystalline form: Amorphous solid, when heated and then cooled slowly by annealing, becomes crystalline at some temperature. That is why glass objects of ancient times look milky because some crystallization has taken place.
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Amorphous materials area)in which atom align themselves in geometric patternb)in which there is no definite atomic structure and atoms exist in a random pattern just as in liquidc)which is not attracted by phosphorousd)which emits fumese)None of the above/ More than one of the aboveCorrect answer is option 'B'. Can you explain this answer?
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