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JEE Exam  >  JEE Test  >  Chemistry Main & Advanced  >  Test: Stoichiometric and Non-stoichiometric defects - JEE MCQ

Stoichiometric and Non-stoichiometric defects - Free MCQ Practice Test


MCQ Practice Test & Solutions: Test: Stoichiometric and Non-stoichiometric defects (10 Questions)

You can prepare effectively for JEE Chemistry for JEE Main & Advanced with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Stoichiometric and Non-stoichiometric defects". These 10 questions have been designed by the experts with the latest curriculum of JEE 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 20 minutes
  • - Number of Questions: 10

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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

Detailed Solution: Question 1

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: 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?

Detailed Solution: Question 3

-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

Detailed Solution: Question 4

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: 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

Detailed Solution: Question 6

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?

Detailed Solution: Question 7

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.

Test: Stoichiometric and Non-stoichiometric defects - Question 8
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Each of the following solids show, the Frenkel defect except

Detailed Solution: Question 8

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: 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

Detailed Solution: Question 10

AgBr exhibits Frenkel defect due to large difference in the size of and ions.

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About this JEE Practice Test

This test contains 10 MCQs on Stoichiometric and Non-stoichiometric defects with detailed solutions for each question. It is part of the Chemistry for JEE Main & Advanced course on EduRev, designed to align with the current JEE syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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