MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Materials Science knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
At temperatures greater than 570 degree centigrade, which of the following can be a stable composition of iron oxide? |
| A. | Fe0.99O |
| B. | Fe0.9O |
| C. | Fe0.96O |
| D. | Fe0.97O |
| Answer» C. Fe0.96O | |
| 2. |
In which of the following case the first element can occupy both lattice position and interstitial position? |
| A. | Cu in FCC-Ni |
| B. | C in FCC-Fe |
| C. | B in steel |
| D. | Al in FCC-Fe |
| Answer» D. Al in FCC-Fe | |
| 3. |
How are point defects classified based on the source of the atom? |
| A. | Statistical and structural |
| B. | Random and ordered |
| C. | Intrinsic and extrinsic |
| D. | Interior and exterior |
| Answer» D. Interior and exterior | |
| 4. |
The presence of interstitial carbon atom increases the hardness of which of the following: |
| A. | Martensite |
| B. | Austenite |
| C. | Cementite |
| D. | Pearlite |
| Answer» B. Austenite | |
| 5. |
For the given magnitude of shift which of the following can cause the formation of an off-center ion? |
| A. | 0.1 Å |
| B. | 0.05 Å |
| C. | 0.5 Å |
| D. | 1.1 Å |
| Answer» D. 1.1 Å | |
| 6. |
Which of the following compound shows both Schottky and frenkel defect? |
| A. | Silver(I) iodide |
| B. | Silver(I) bromide |
| C. | Magnesium sulphide |
| D. | Titanium oxide |
| Answer» C. Magnesium sulphide | |
| 7. |
Schottky and Frenkel defects are ___________ |
| A. | Interstitial and vacancy defects respectively |
| B. | Vacancy and interstitial defect respectively |
| C. | Both interstitial defects |
| D. | Both vacancy defects |
| Answer» C. Both interstitial defects | |
| 8. |
F-centers are _________ |
| A. | Cathodic vacancy in a crystal occupied by one or more paired electron |
| B. | Cathodic vacancy in a crystal occupied by one or more unpaired electron |
| C. | Anionic vacancy in a crystal occupied by one or more paired electron |
| D. | Anionic vacancy in a crystal occupied by one or more unpaired electron |
| Answer» E. | |
| 9. |
If the number of F-centers are more, the color of the compound gets more intense. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
What is the color of zinc oxide? |
| A. | Blue |
| B. | Red |
| C. | Yellow |
| D. | Orange |
| Answer» D. Orange | |
| 11. |
Which is not a name given to vacancy in some ionic solid? |
| A. | H-center |
| B. | F-center |
| C. | Color center |
| D. | Luminescence center |
| Answer» B. F-center | |
| 12. |
Which of the following point defects can be attributed to from the below options?i) Stress Fieldsii) Strain fieldsiii) Chargeiv) Current |
| A. | i) and ii) |
| B. | ii) and iv) |
| C. | i) and iii) |
| D. | ii) and iv) |
| Answer» D. ii) and iv) | |
| 13. |
Which type of defect are point defects? |
| A. | One dimensional defect |
| B. | Zero dimensional defect |
| C. | Two dimensional defect |
| D. | Three dimensional defect |
| Answer» C. Two dimensional defect | |