MCQOPTIONS
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MCQOPTIONS
This section includes 14 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. |
There is no difference between diffusion and net diffusion. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
In dilute aqueous solutions which of the following can be the value of diffusion coefficient at room temperature? |
| A. | 7.0E-10 |
| B. | 0.7e-10 |
| C. | 2.2e-9 |
| D. | 2.2e-10 |
| Answer» B. 0.7e-10 | |
| 3. |
The diffusivity of copper in copper increases by how many times when the temperature is increased from 500 ° C to 1000 °C? |
| A. | 200000 |
| B. | 100000 |
| C. | 150000 |
| D. | 170000 |
| Answer» B. 100000 | |
| 4. |
Which of the following is not a part of Fick’s first law? |
| A. | Diffusion flux |
| B. | Diffusion coefficient |
| C. | Change in concentration with respect to the position in space |
| D. | Change in concentration with respect to time |
| Answer» E. | |
| 5. |
IN_DILUTE_AQUEOUS_SOLUTIONS_WHICH_OF_THE_FOLLOWING_CAN_BE_THE_VALUE_OF_DIFFUSION_COEFFICIENT_AT_ROOM_TEMPERATURE??$ |
| A. | 0.7e<sup>-9</sup> |
| B. | 0.7e<sup>-10</sup> |
| C. | 2.2e<sup>-9</sup> |
| D. | 2.2e<sup>-10</sup> |
| Answer» B. 0.7e<sup>-10</sup> | |
| 6. |
There_is_no_difference_between_diffusion_and_net_diffusion.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
What is the shape of the graph for steady state diffusion where the concentration of diffusion species is in the y-axis and position is in x-axis? |
| A. | Parabola |
| B. | Hyperbola |
| C. | Ellipse |
| D. | Straight line |
| Answer» E. | |
| 8. |
The diffusivity of copper in copper increases by how many times when the temperature is increased from 500 ° C to 1000 °C?$ |
| A. | 200000 |
| B. | 100000 |
| C. | 150000 |
| D. | 170000 |
| Answer» B. 100000 | |
| 9. |
Flux direction is opposite to the direction of the concentration gradient. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
Velocity of diffusing particles does not depend on _______ |
| A. | Temperature |
| B. | Viscosity of the fluid |
| C. | Size of the particles |
| D. | Pressure |
| Answer» E. | |
| 11. |
Which of the following is not a part of Fick’s first law?$ |
| A. | Diffusion flux |
| B. | Diffusion coefficient |
| C. | Change in concentration with respect to the position in space |
| D. | Change in concentration with respect to time |
| Answer» E. | |
| 12. |
Which of the following law is used for steady state diffusion? |
| A. | Fick’s law |
| B. | Newton’s law of diffusion |
| C. | Bragg’s law |
| D. | Charles’s law |
| Answer» D. Charles‚Äö√Ñ√∂‚àö√ë‚àö¬•s law | |
| 13. |
Which of the following gases can be purified by allowing it to diffuse through palladium cap? |
| A. | Oxygen |
| B. | Hydrogen |
| C. | Chlorine |
| D. | Nitrogen |
| Answer» C. Chlorine | |
| 14. |
In steady state diffusion which of the following remains constant? |
| A. | Concentration gradient |
| B. | Kinetic energy of particles |
| C. | Potential energy of particles |
| D. | Change of concentration with respect to temperature |
| Answer» B. Kinetic energy of particles | |