Home
Class 12
CHEMISTRY
Any deviation from the perfectly ordered...

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

A

F-centres

B

Interstitial defect

C

Frenkel defect

D

Schottky defect

Text Solution

Verified by Experts

The correct Answer is:
D
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • SOLID STATE

    FIITJEE|Exercise SOLVED PROBLEMS (OBJECTIVE) MATRIX - MATCH TYPE|2 Videos

  • SOLID STATE

    FIITJEE|Exercise EXERCISE|5 Videos

  • SOLID STATE

    FIITJEE|Exercise SOLVED PROBLEMS (OBJECTIVE) REASONING TYPE QUESTIONS|1 Videos

  • QUALITATIVE ANALYSIS

    FIITJEE|Exercise Single interger answer type|3 Videos

  • STOICHIOMETRY AND BALANCING REDOX REACTION

    FIITJEE|Exercise SINGLE INTEGER ANSWER TYPE QUESTIONS|5 Videos

Similar Questions

Explore conceptually related problems

Non-Stoichiometric defect

Why stoichiometric defects are also called intrinsic defects ?

Knowledge Check

  • 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. KBr shows, which of the following stoichiometric defects ?

    A
    Frenkel defect
    B
    Schottky defect
    C
    Metal excess defect
    D
    Metal deficiency

  • 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. Which of the following defect, if present, lowers the density of the crystal ?

    A
    Frenkel
    B
    Schottky
    C
    Edge dislocation
    D
    Constitution of F - centres

  • 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. When an ion leaves ir correct lattice and occupies interstital sites in its crystal lattice, it is called

    A
    Crystal defect
    B
    Frenkel defect
    C
    Schottky defect
    D
    None

    • Similar Questions

    Explore conceptually related problems

    Why stoichiometric defects are also called intrinsic defects ?

    Why stoichiometric defects are also called intrinsic defects?

    Name one solid which has both Schottky and Frenkel defects

    Which has Frenkel defect ?

    Frenkel and Schottky defects are:

    Home
    Profile