JEE · NEET Previous Year Question

When is added to crystal, the defect introduced is

Topic: JEE PYQ

Answer: B. Full step-by-step solution below.

  1. AFrenkel defect only
  2. BSchottky defect only
  3. CNo charge
  4. DBoth Frenkel and Schottky defects

Correct answer: B

Solution

(b) When mixing and , each added ion of replaces as they have similar radii. Since, the charge of and is of +2 and +1 respectively, It means that one mole of provides one mole of vacancies in crystal structure and produce impurity defect.

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