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The Solid State
Short Answer Type
211.
What is the maximum possible coordination number of an atom in an hcp crystal structure of an element?
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212.
How many atoms can be assigned to its unit cell if an element forms
(i) a body centred cubic cell, and (ii) a face centred cu
bic cell?
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213.
Name an element with which germanium can be doped to produce an n-type semiconductor.
arsenic (As) or phosphorus (P).
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214.
What is the nature of crystal defect produced when sodium chloride is doped with MgCl
2
?
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215.
What happens when a ferromagnetic substance is subjected to high temperature?
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216.
Name a substance which on addition to AgCl causes cation vacancy in it.
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217.
What makes alkali metal halides sometimes coloured, which are otherwise colourless?
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218.
Define the term ‘amorphous’.
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219.
Which point defect lowers the density of a crystal?
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220.
What is coordination number of a metal atom in ccp structure?
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