1.

    Which defect does not disturb the density of the solid?

    A

    Schottky defect

    B

    Metal excess defect

    C

    Frenkel defect

    D

    Metal deficiency defect

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:The Solid State
    🎯Topic:Stoichiometric Defects, Non-Stoichiometric Defects
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :0.5 mins
    🔄Ncert Concepts :Frenkel Defect, Crystal Defects, Density of Solids

    Related Questions

    1.

    The yellow colour of ZnO{\rm{ZnO}} and conducting nature produced in heating is due to:

    A

    Metal excess defects due to interstitial cation

    B

    Extra positive ions present in an interstitial site

    C

    Trapped electrons

    D

    All of the above

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:The Solid State
    🎯Topic:Stoichiometric Defects, Non-Stoichiometric Defects
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Solid State Chemistry, Metal Excess Defects, F-centers, Conductivity

    2.

    Schottky defects occurs mainly in electrovalent compounds where

    A

    Positive ions and negative ions are of different size

    B

    Positive ions and negative ions are of same size

    C

    Positive ions are small and negative ions are big

    D

    Positive ions are big and negative ions are small

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:The Solid State
    🎯Topic:Stoichiometric Defects, Non-Stoichiometric Defects
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Schottky defect, ionic compounds, crystal structure

    3.

    Which of the following statement is true?

    A

    Some complex metal oxides behave as superconductor

    B

    Zinc oxide can act as superconductor

    C

    An impurity of tetravalent germanium in trivalent gallium creates electron deficiency

    D

    A Frenkel defect is formed when an ion is displaced from its lattice site to an interstitial site

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:The Solid State
    🎯Topic:Stoichiometric Defects, Non-Stoichiometric Defects
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Superconductivity, Semiconductor doping, Crystal defects

    4.

    The correct statement regarding F-centre is

    A

    Electron are held in the voids of crystals

    B

    F-centre produces colour to the crystals

    C

    Conductivity of the crystal increases due to F-centre

    D

    All of the above

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:The Solid State
    🎯Topic:Stoichiometric Defects, Non-Stoichiometric Defects
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :F-center, crystal defects, color centers, electrical conductivity

    5.

    Schottky defect is observed in the crystal of

    A

    NaClNaCl

    B

    CaF2Ca{F_2}

    C

    AgClAgCl

    D

    MgCl2MgC{l_2}

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:The Solid State
    🎯Topic:Stoichiometric Defects, Non-Stoichiometric Defects
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Schottky defect, ionic crystals

    6.

    Frenkel defect is found in crystals in which the radius ration is

    A

    1.51.5

    B

    1.71.7

    C

    Very low

    D

    Slightly less than unity

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:The Solid State
    🎯Topic:Stoichiometric Defects, Non-Stoichiometric Defects
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Frenkel defect, radius ratio, crystal defects

    7.

    Which of the following statements is INCORRECT regarding Schottky defects?

    A

    Equal number of cations and anions are missing

    B

    Density of the substance decreases

    C

    Electrical neutrality is maintained

    D

    Typically observed in compounds with large size difference between cations and anions

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:The Solid State
    🎯Topic:Stoichiometric Defects, Non-Stoichiometric Defects
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Stoichiometric Defects, Schottky Defect, Crystal Density

    8.

    Which is the wrong statement regarding a crystal containing Schottky defect?

    A

    Density of the crystal increases

    B

    Electrical neutrality of the crystal is maintained

    C

    It is a stoichiometric defect

    D

    Equal number of cations and anions are missing from the lattice

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:The Solid State
    🎯Topic:Stoichiometric Defects, Non-Stoichiometric Defects
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Schottky defect, Crystal defects, Electrical neutrality, Entropy, Density

    9.

    Ionic solids with Schottky defects contain in their structure :

    A

    Equal number of cations and anion vacancies

    B

    Interstitial anions and anion vacancies

    C

    Cation vacancies only

    D

    Cation vacancies and interstitial cations

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:The Solid State
    🎯Topic:Stoichiometric Defects, Non-Stoichiometric Defects
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Schottky defect, ionic solids, vacancies

    10.

    When electrons are trapped into the crystal in anion vacancy, the defect is known as :

    A

    Schottky defect

    B

    Frenkel defect

    C

    Stoichiometric defect

    D

    F-centres

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:The Solid State
    🎯Topic:Stoichiometric Defects, Non-Stoichiometric Defects
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :crystal defects, anion vacancy, F-centers

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