Lesson: Solid state- Topic : Amorphous and Crystalline solids:

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Prepared by Sri. Ravikishore P., M.Sc., B.Ed., PGT (Science)

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What is the meaning of the Greek word “amorphos”

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a) Full form

b) No form

c) Completely crystalline

d) None of these

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Quartz is an example of ---

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a) Crystalline

b) Amorphous

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Plastic is an example of …

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a) Crystalline

b) Amorphous

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Which type of crystals can be moulded in to different shapes…….

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a) Crystalline

b) Amorphous

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The sharp M.P for the crystalline solids are due to…

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a) Chemial bonds

b) fixed Ionic interactions

c) irotropy

d) anisotropy

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The property of anisotropy is characterized for which type of solids.

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a) Amorphous

b) Crystalline

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Which are true solids?

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a) Amorphous

b) Crystalline

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The reason for isotropic of amorphous solids is …. (multiple answers)

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a) Long range order

b) Short range order

c) Alignment of the atoms are irregular.

d) Arrangement of the particles are different in different directions.

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What are Pseudo solids

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a) The solids which has a fixed atom positions

b) The solids which has a property to flow

c) The solids which has the property of anisotropy

d) The solids which has definite value of heat of fusion

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Which of the following compound can be used in Photovoltaic cells?

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a) Silicon Carbide

b) Amorphous carbon

c) Amorphous silicon

d) Quartz

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