Statement I : In any ionic solid [M,X] with Schottky defects, the number of positive and negative ions are same.

Question

Read the following questions and answer as per the direction given below :

(a) Statement I is true; Statement II is also true; Statement II is a correct explanation of Statement I.

(b) Statement I is true; Statement II is'true; Statement II is not the correct explanation of Statement I.

(c) Statement I is true; Statement II is false.

(d) Statement I is false; Statement II is true. I.

Statement I : In any ionic solid [M,X] with Schottky defects, the number of positive and negative ions are same. 

Statement II : Equal number of cation and anion vacancies are present.

Answer 1

Correct option (a) Statement I is true; Statement II is also true; Statement II is a correct explanation of Statement I.

Explanation:

Schottky defect arises, when an atom or ion is missing from its normal lattice site. To maintain neutrality of crystal equal number of opposite ions are also missing. Thus, the ionic solid [MX] having Schottky defect will have the same number of cations and anions.

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