Assertion : In any ionic solid [MX] with Schottky defects, the number of positive and negative ions are same.
Reason : Equal number of cation and anion vacancies are present.

Options

A. If both (A) and ( R) are correct and ( R) is the correct explanation of(A).
B. If both (A) and ( R) are correct, but ( R) is not the correct explanation of (A).
C. If (A) is correct, but ( R) is incorrect.
D. If both (A) and ( R) are incorrect.

Answer

A

Explanation

Schottky defect is defined as a vacancy developed for anion and cation site, so cation and anion vacancy will be same in number. Therefore an ionic solid MX with Schottky defects will still have the same number of anions and cations.