The Solid State
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A group 14 element is to be converted into N-type semi-conductor by doping it with a suitable impurity. To which group should this impurity belong?
This impurity should belong to group 15.
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What type of substances would make better permanent magnets, ferromagnetic or ferrimagnetic, justify your answer.
What type of stoichiometric defect is shown by
(i) ZnS,
(ii)
AgBr (iii)
KCl
Ionic solids, which have anionic vacancies due to metal excess defect, develop colour. Explain with the help of a suitale example.
Explain how vacancies are introduced in an ionic solid when a cation of higher valence is added as an impurity in it.
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