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Statement I: In any ionic solid [MX] wit...

Statement I: In any ionic solid `[MX]` with Schottky defect, the number of positive and negative ions are same.
Statement II: An equal number of cation and anion vacancies is present.

A

STATEMENT - 1 is True, STATEMENT - 2 is True, STATEMENT - 2 is correct explanation for STATEMENT - 1

B

STATEMENT - 1 is True, STATEMENT - 2 is True , STATEMENT - 2 is NOT a correct explanation for STATEMENT - 1

C

STATEMENT - 1 is True, STATEMENT - 2 is False

D

STATEMENT - 1 is False, STATEMENT - 2 is True

Text Solution

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The correct Answer is:
B
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Statement -1. In any ionic solid, [ MX], with Schottky defects, the number of positive and negative ions are same. Statement -2. Equal number of cation and anion vacancies are present .

Assertion (A) In any ionic solid (MX) with Schttky defects, the number of positive and negative ions is the same. Reason (R) Equall number of cation and anion vacancies are present.

Knowledge Check

  • Statement-1: In any ionic solid, [MX] , with Schottky defects, the number of positive and negative ions are same. Statement-2:Equal number of cation and anion vacancies are present.

    A
    Statement 1 is True , Statement-2 is True , Statement-2 is a correct explanation for statement-1
    B
    Statement 1 is True , Statement-2 is True , Statement-2 is NOT a correct explanation of Statement-1
    C
    Statement-1 is True , Statement-2 is False
    D
    Statement -1 is False , Statement -2 is True

  • Statement 1: In any ionic solid [MX] withschotty defects, the number of positive and negative ions are same Statement 2: Equals number of cation and anion vacancies are present .

    A
    Statement-1 is True, statement-2 is True, Statement-2 is a correct explantion for Statement-1.
    B
    Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1
    C
    Statement-1 is True, Statement-2 is False.
    D
    Statement-1 is False, Statement-2 is True.

  • In the following question, a statement of assertion is followed by a statement of reason. Mark the correct choice. Assertion : In any ionic solid [MX] with schottky defects, the number of positive and negative ions are same. Reason : Equal number of cation and aniojn vacancies are present .

    A
    Both assertion and reason are true and reason is the correct explanation of assertion .
    B
    Both assertion and reason are true but reason.
    C
    Assertion is true but reason is false.
    D
    Both assertion and reason are false.

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    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 ?

    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

    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

    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 : In Schottky defect, density of crystal decreases. R : Equal number of cations and anions are missing in Schottky defect.

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