Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion In any ionic solid (MX) with Schottky defect, the number of positive and negative ions are same. Reason Unequal number of cation and anion vacancies are present.A) If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C) If Assertion is true but Reason is false.
D) If both Assertion and Reason are false.
Correct Answer: C
Solution :
In any ionic solid (MX) with Schottky defect equal number of positive and negative ions are missing from their normal lattice sites and thus, equal number of cationic and anionic vacancies are produced. Hence, Assertion is true but Reason is false.
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