The Solid State

  • Question 53
    CBSEENCH12005401

    What are lattice defects imperfection?

    Solution
    lattice defect can be define as combination of Line defects and plane defects together are called lattice defects.
    Question 54
    CBSEENCH12005402

    what is Frenkel defect.Why is Frenkel defect found in AgCl ?

    Solution
    Frenkel Defect: This defect is shown by ionic solids. The smaller ion (usually cation) is dislocated from its normal site to an interstitial site . It creates a vacancy defect at its original site and an interstitial defect at its new location.
     Frenkel defect is shown by ionic substance in which there is a large difference in the size of ions so it is due to difference in size of Ag
    + and CI, Ag+ occupies voids.
    Question 55
    CBSEENCH12005403

    What  type of void are developed in hexagonal close packing?

    Solution
    In hexagonal close packing octahedral void as well as tetrahedral void are produced.
    Question 56
    CBSEENCH12005404

    What is the co-ordination number of an octahedral void?

    Solution
    The co-ordination number of an octahedral void  is  6 : 6.

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