Q. No.Select the correct option based on statements below:
| Assertion (A): | In a particular point defect, an ionic solid is electrically neutral, even if few of its cations are missing from its unit cells. |
| Reason (R): | In an ionic solid, Frenkel defect arises due to dislocation of cation from its lattice site to interstitial site, maintaining overall electrical neutrality. |
| 1. | (A) is false but (R) is true. |
| 2. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 3. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 4. | (A) is true but (R) is false. |
Subtopic: Imperfections in Solids & Semiconductors |
From NCERT
NEET - 2022
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| Assertion (A): | Due to metal deficiency defect, ZnO gives the appearance of yellow color |
| Reason (R): | O2- ion occupies anion vacancy and forms F - center |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Imperfections in Solids & Semiconductors |
From NCERT
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Select the correct option based on statements below:
| Assertion (A): | Semiconductors are solids with conductivities in the range from 10-6 — 104 ohm-1 m-1. |
| Reason (R): | Intermediate conductivity in semiconductors is due to a partially filled valence band. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Subtopic: Imperfections in Solids & Semiconductors |
From NCERT
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Select the correct option based on statements below:
| Assertion (A): | Due to Frenkel defect, the density of the crystalline solid decreases. |
| Reason (R): | In Frenkel defect cation and anion leave the crystal. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Imperfections in Solids & Semiconductors |
80%
From NCERT
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Select the correct option based on statements below:
| Assertion (A): | LiCl shows pink colour when heated in presence of lithium vapours. |
| Reason (R): | LiCl shows Frenkel defect. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Imperfections in Solids & Semiconductors |
64%
From NCERT
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| Statement 1: | ZnS shows Frenkel defect. |
| Statement 2: | AgBr shows Frenkel as well as Schottky defect. |
1. Statement 1 is true , statement 2 is false.
2. Statement 1 is false , statement 2 is true.
3. Both statements are true.
4. Both statements are false.
Subtopic: Imperfections in Solids & Semiconductors |
84%
From NCERT
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Match the types of defects given in Column I with the statement given in Column II.
| Column I | Column II |
| A. Impurity defect | 1. NaCl with anionic sites called F-centres |
| B. Metal excess defect | 2. FeO with Fe3+ |
| C. Metal deficiency defect | 3. NaCl with Sr2+ and some cationic sites vacant |
Codes
| A | B | C | |
| 1. | 2 | 3 | 1 |
| 2. | 3 | 1 | 2 |
| 3 | 1 | 2 | 3 |
| 4. | 2 | 1 | 3 |
Subtopic: Imperfections in Solids & Semiconductors |
73%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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Match the defects given in Column I with the statements given in Column II.
| Column I | Column II |
| A. Simple vacancy defect | 1. Shown by non-ionic solids and increases the density of the solid |
| B. Simple interstitial defect | 2. Shown by ionic solids and decreases the density of the solid |
| C. Frenkel defect | 3. Shown by non-ionic solids and decreases the density of the solid |
| D. Schottky defect | 4. Shown by ionic solids and density of the solid remains the same |
Codes
| A | B | C | D | |
| 1. | 3 | 1 | 4 | 2 |
| 2. | 1 | 2 | 3 | 4 |
| 3. | 1 | 4 | 3 | 2 |
| 4. | 4 | 1 | 3 | 2 |
Subtopic: Imperfections in Solids & Semiconductors |
82%
From NCERT
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Which of the following statements is correct?
| I. | Ferrimagnetic substances lose ferrimagnetism on heating and become paramagnetic |
| II. | Ferrimagnetic substances do not lose ferrimagnetism on heating and remain ferrimagnetic |
| III. | Antiferromagnetic substances have domain structures similar to ferromagnetic substances and their magnetic moments are not canceled by each other |
| IV. | In ferromagnetic substances, all the domains get oriented in the direction of the magnetic field and remain as such even after removing the magnetic field |
The correct choice among the given is -
1. (I, II)
2. (II, III)
3. (III, IV)
4. (I, IV)
Subtopic: Imperfections in Solids & Semiconductors |
80%
From NCERT
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Under the influence of the electric field, which of the following statement is true about the movement of electrons and holes in a p-type semiconductor?
| I. | Electron will move towards the positively charged plate through electron holes |
| II. | Holes will appear to be moving towards the negatively charged plate |
| III. | Both electrons and holes appear to move towards the positively charged plate |
| IV. | Movement of electrons is not related to the movement of holes |
The correct choice among the given is-
1. (I, II)
2. (II, III)
3. (III, IV)
4. (I, IV)
Subtopic: Imperfections in Solids & Semiconductors |
75%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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