GATE XE concept:schottky-defects PYQs & Answers

Questions 1–3 of 3. Imported answers require independent review unless marked reviewed.

Which one of the following statements regarding point defects in ionic solids is correct?

Your answerChoose one option.

Frenkel defects are dominant in those ionic solids where there is a considerable size difference between the cation and anion.

Schottky defects are dominant in those ionic solids where there is a considerable size difference between the cation and anion.

Schottky defects are the dominant defects in all ionic solids.

Similar density of both Frenkel and Schottky defects is present in all ionic solids.

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Which of the following figures schematically represent(s) either the Frenkel defect or the Schottky defect in ionic solids?

Your answerSelect all correct options. You can choose more than one.

Diagram for Engineering Sciences question 59

Diagram for Engineering Sciences question 59 (figure 2)

Diagram for Engineering Sciences question 59 (figure 3)

Diagram for Engineering Sciences question 59 (figure 4)

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The number of Schottky defects per mole of KCl at 300 °C under equilibrium condition will be:

Given: Activation energy for the formation of Schottky defect = 250 kJ.mol⁻¹ Avogadro number = 6.023 × 10²³ mol⁻¹ Universal Gas Constant = 8.314 J.K⁻¹.mol⁻¹

Your answerChoose one option.

1.21 × 10¹⁸

1.52 × 10¹⁶

9.75

2.42 × 10¹²

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GATE XE concept:schottky-defects PYQs

How to practice concept:schottky-defects

Question 57

Question 59

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