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Test: Stoichiometric and Non-stoichiometric defects - JEE MCQ


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10 Questions MCQ Test - Test: Stoichiometric and Non-stoichiometric defects

Test: Stoichiometric and Non-stoichiometric defects for JEE 2024 is part of JEE preparation. The Test: Stoichiometric and Non-stoichiometric defects questions and answers have been prepared according to the JEE exam syllabus.The Test: Stoichiometric and Non-stoichiometric defects MCQs are made for JEE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Stoichiometric and Non-stoichiometric defects below.
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Test: Stoichiometric and Non-stoichiometric defects - Question 1
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When n-type and p-type semiconductors are allowed to come into contact

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When n-type and -type semiconductors are allowed to come into contact then some electrons will flow from to .
Test: Stoichiometric and Non-stoichiometric defects - Question 2
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Superconductors are derived from compounds of

Detailed Solution for Test: Stoichiometric and Non-stoichiometric defects - Question 2
Superconductors are derived from compound of block elements.
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Test: Stoichiometric and Non-stoichiometric defects - Question 3
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If we mix a pentavalent impurity in a crystal lattice of germanium, what type of semiconductor formation will occur?

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-type, since electron is set free.
Test: Stoichiometric and Non-stoichiometric defects - Question 4
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To get a - type semiconductor, the impurity to be added to silicon should have which of the following number of valence electrons
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For -type, impurity added to silicon should have more than 4 valence electrons.
Test: Stoichiometric and Non-stoichiometric defects - Question 5
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is heated in an atmosphere of sodium vapour. The resultant yellow colour is due to the formation of
Detailed Solution for Test: Stoichiometric and Non-stoichiometric defects - Question 5
Anion vacancies in alkali halides are produced by heating the alkali halide crystals in atomsphere of the alkali metal vapour. When the metal atoms deposit on the surface they diffuse into the crystal and after ionisation the alkali metal ion occupies cationic vacancies, whereas electron occupies anionic vacancey. Electrons trapped in an anion. Vaccancies are referred to as -centeres that give rise to intresting colour in alkali halides.
Test: Stoichiometric and Non-stoichiometric defects - Question 6
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Non stoichiometric defects are formed by
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In non stoichiometric defects ratio of cation and anion is not same that is represented by chemical ideal formula, this is due to variable oxidation nos of cation. Transition elements show variable oxidation nos.
Test: Stoichiometric and Non-stoichiometric defects - Question 7
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What type of crystal defects is indicated in the diagram given below?
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Schottky defect is a defect which is produced when one cation and anion are missing from their respective positions leaving behind a pair of holes. The crystal as a whole remains neutral because the number of missing positive ions (cations) and negative ions (anions) is the same.

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Each of the following solids show, the Frenkel defect except
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In KCl, co-ordination number of cation and anion is 6 and 6 respectively. KCl is highly ionic so Schottky defect is common.
Note: Schottky defect is common in compounds having high coordination number while Frenkel defect is common in compounds with low coordination number.

Test: Stoichiometric and Non-stoichiometric defects - Question 9
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Schottky defect in crystals is observed when
Detailed Solution for Test: Stoichiometric and Non-stoichiometric defects - Question 9
If in an ionic crystal of the type , equal number of cations and anions are missing from their lattice sites so that the electrical neutrality is maintained. The defect is called Schottky defect.
Test: Stoichiometric and Non-stoichiometric defects - Question 10
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Which one of the following has Frenkel defect
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AgBr exhibits Frenkel defect due to large difference in the size of and ions.
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