Question

48. Given below are two statements labelled as Assertion (A) and Reason (R). Assertion (A): Schottky defect is generally shown by the compounds which have high coordination number. Reason(R): In Schottky defect, equal number of cations and anions are missing from the lattice sites (a) Both A and Rare true and R is the correct explanation A (b) Both A and R are true but is not the correct explanation of A. (c) A is true but R is false, (d) A is false but R is true, son (​

Answer 1

Answer:

b) Both A and R are true but R is not the correct explanation

Explanation:

Answer 2

• The Schottky defect is a kind of stoichiometric defect.
• When equal numbers of anions and cations are missing from the lattice sites in ionic crystals, then the defect is known as the Schottky defect.
• During this defect, electrical neutrality is maintained.
• The Schottky defect is shown by the ionic crystals, which have a high coordination number.

Hence, both the assertion and the reason are correct.

However, the reason is not the correct explanation of the assertion.

The correct option is (b).