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Assertion (A) : Point defects are the ir...

Assertion (A) : Point defects are the irregularities or deviations from ideal arrangement around a point in a crystalline substance.
Reason (R) : Schottky defect is basically a vacancy defect in ionic solids.

A

Both Assertion (A) and Reason (R) are correct statements, and Reason (R) is the correct explanation of the Assertion (A).

B

Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A).

C

Assertion (A) is correct, but Reason (R) is incorrect statement.

D

Assertion (A) is incorrect, but Reason (R) is correct statement.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze the assertion and reason provided. ### Step-by-Step Solution: 1. **Understanding the Assertion (A)**: - The assertion states that "Point defects are the irregularities or deviations from ideal arrangement around a point in a crystalline substance." - This is true because point defects refer to disruptions in the regular arrangement of atoms in a crystal lattice. These deviations can occur due to missing atoms (vacancies), extra atoms (interstitials), or impurities. 2. **Understanding the Reason (R)**: - The reason states that "Schottky defect is basically a vacancy defect in ionic solids." - This is also true. A Schottky defect occurs when an equal number of cations and anions are missing from the lattice structure, leading to vacancies. This type of defect is commonly found in ionic solids like NaCl. 3. **Analyzing the Relationship**: - While both the assertion and reason are true, we must determine if the reason correctly explains the assertion. - The assertion describes what point defects are in general, while the reason specifically describes a type of point defect (Schottky defect). - Therefore, although both statements are correct, the reason does not provide a correct explanation for the assertion as it only addresses one specific type of point defect. 4. **Conclusion**: - Since both the assertion and reason are true but the reason does not explain the assertion, the correct answer is that both statements are true, but the reason is not the correct explanation of the assertion. ### Final Answer: - Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
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Defects are basically irregularities in the arrangement of constituent particles. Broadly speaking the defects are of two types. Namely point defects and line defects. Point defects: The irregularities or deviations from ideal arrangement around a point or an atom in the crystalline substance. Line defects : The irregularities or deviations from ideal arrangement in enitre row of lattice points. Answer the following questions. Select the correct statements : (i) Frenkel defect create a vacancy defect at its original site and an interstitial defect at its new position. (ii) Frenkel defect is stoichiometric point defect. (iii) Frenkel defect is alos called dislocation defect. (iv) Silver halide shows Frenkel defect.

Defects are basically irregularities in the arrangement of constituent particles. Broadly speaking the defects are of two types. Namely point defects and line defects. Point defects: The irregularities or deviations from ideal arrangement around a point or an atom in the crystalline substance. Line defects: The irregularities or deviations from ideal arrangement in entire row of lattice points. Answer the following question. Select the correct statements : Frenkel defect create a vacancy defect at its original site and an interstitial defect at its new position. Frenkel defect is also called dislocation defect Silver halide shows Frenkel defect

Defects are basically irregularities in the arrangement of constituent particles. Broadly speaking the defects are of two types. Namely point defects and line defects. Point defects: The irregularities or deviations from ideal arrangement around a point or an atom in the crystalline substance. Line defects: The irregularities or deviations from ideal arrangement in entire row of lattice points. Answer the following question. When crystals of LiCI is heated in an atmosphere of Li (vap). it appears pink in colour because of

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Write two points of distinction between Schottky and Frenkel defects.

In these questions, a statement of Assertion followed by a statement of Reason is given. Choose the correct answer out of the following choices. Assertion (A): The diagram shows Schottky defect. Reason (R): Schottky defect occurs in ionic solids.