- 1(current)
Q. No.Heating of a solid favour the -
1. Metal deficiency defect
2. Impurity defects
3. Vacancy defect
4. None of the above
1. Metal deficiency defect
2. Impurity defects
3. Vacancy defect
4. None of the above
Subtopic: Â Imperfections in Solids & Semiconductors |
 61%
Level 2: 60%+
Hints
| 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: Â Imperfections in Solids & Semiconductors |
 84%
Level 1: 80%+
Hints
When a cation of higher valency is added as an impurity in an ionic solid, then :
1. Vacancies are created .
2. Stoichiometry remains unaffected.
3. Excess of metal ions is created.
4. Both (2) and (3)
1. Vacancies are created .
2. Stoichiometry remains unaffected.
3. Excess of metal ions is created.
4. Both (2) and (3)
Subtopic: Â Imperfections in Solids & Semiconductors |
Level 3: 35%-60%
Hints
The ionic solid among the following, that has anionic vacancy due to metal excess, defect and develop color is-
1. KCl
2. NaCl
3. TiO
4. All of the above
1. KCl
2. NaCl
3. TiO
4. All of the above
Subtopic: Â Imperfections in Solids & Semiconductors |
 74%
Level 2: 60%+
Hints
A group 14 element is converted into n-type semiconductor by doping it with :
1. Boron
2. Aluminium
3. Phosphorous
4. All of the above.
Subtopic: Â Imperfections in Solids & Semiconductors |
 76%
Level 2: 60%+
Hints
Substances used for making permanent magnets are :
1. Ferrimagnetic
2. Ferromagnetic
3. Antiferromagnetic
4. Both (1) and (3)
1. Ferrimagnetic
2. Ferromagnetic
3. Antiferromagnetic
4. Both (1) and (3)
Subtopic: Â Imperfections in Solids & Semiconductors |
 79%
Level 2: 60%+
Hints
- 1(current)
Q. No.
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