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Assertion: In frekel defect in an ionic ...

Assertion: In frekel defect in an ionic crystal, an ion is dispalced from its normal site to an interstitial site.
Reason: There is both a vacancy and an intersitial ion.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion

B

If both assertion and reason are true but reason is not the correct explanation of the assertion

C

If assertion is true bur reason is false

D

If assertion is false bur reason is true

Text Solution

Verified by Experts

The correct Answer is:
a
There is both a vacancy and an interstial ion
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Knowledge Check

  • In a crystal some iron are missing from normal sites. This is an example of

    A
    F-centres
    B
    Interstitial defect
    C
    Frenkel defect
    D
    Schottky defect

  • In a crystal, some ions are missing from normal sites. This is an example of :

    A
    `F-` centres
    B
    interstitial defect
    C
    Frenkel defect
    D
    Schottky defect

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    A
    If both assertion and reason are true, and reason is the true explanation of the assertion.
    B
    If both assertion and reason are true, but reason is not the true explanation of the assertion.
    C
    If assertion is true , but reason is false
    D
    If both assertion and reason are false.

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    In AgCl , the Ag^(o+) ions are deisplaced from their lattice position to an interstitial position. Such a defect is called

    Any deviation from the perfectly ordered arrangement constitutes a defect or imperfection. The compounds in which the number of irregularity are present in the arrangement of atoms or ions are called atomic imperfections or point defects. These may be stochiometric or non - stoichlometric. Stoichiometric defects are further classified into Schottky defects in which number of positive and negative ions are missing in equal ratio and Frenkel defects in which an ion leaves its correct lattice sites and occupies on interstitial site. Schottky defect is more common in ionic compounds with high co-ordination number and where the size of positive and negative ions are almost equal, while in Frenkel defects are common in ionic compounds, which have low co-ordination number and in which there is large difference in size between positive and negative ions. In a crystal some ions are missing from normal sites. This is an example of

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