MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Mass Transfer knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A binary mixture of oxygen and nitrogen with partial pressures in the ratio 0.21 and 0.79 is contained in a vessel at 300 K. If the total pressure of the mixture is 1 * 10 5 N/m2, find the average molecular weight of the mixture |
| A. | 28.84 |
| B. | 29.84 |
| C. | 30.84 |
| D. | 31.84 |
| Answer» B. 29.84 | |
| 2. |
A binary mixture of oxygen and nitrogen with partial pressures in the ratio 0.21 and 0.79 is contained in a vessel at 300 K. If the total pressure of the mixture is 1 * 10 5 N/m2, find mass fraction of oxygen |
| A. | 0.133 |
| B. | 0.233 |
| C. | 0.333 |
| D. | 0.433 |
| Answer» C. 0.333 | |
| 3. |
A binary mixture of oxygen and nitrogen with partial pressures in the ratio 0.21 and 0.79 is contained in a vessel at 300 K. If the total pressure of the mixture is 1 * 10 5 N/m2, find molar fraction of nitrogen |
| A. | 0.79 |
| B. | 0.21 |
| C. | 0.23 |
| D. | 0.13 |
| Answer» B. 0.21 | |
| 4. |
A binary mixture of oxygen and nitrogen with partial pressures in the ratio 0.21 and 0.79 is contained in a vessel at 300 K. If the total pressure of the mixture is 1 * 10 5 N/m2, find overall mass density |
| A. | 4.156 kg/m3 |
| B. | 3.156 kg/m3 |
| C. | 2.156 kg/m3 |
| D. | 1.156 kg/m3 |
| Answer» E. | |
| 5. |
Given diagram shows diffusion of water vapor through air. Identify the correct statement |
| A. | The water evaporates and diffuses downward |
| B. | The water does not evaporates but diffuses upward |
| C. | The water evaporates and diffuses upward |
| D. | The water does not evaporates but diffuses downward |
| Answer» D. The water does not evaporates but diffuses downward | |
| 6. |
For a binary mixture of species A and B, the molar average velocity is defined as |
| A. | n a V a + n b V b |
| B. | n a V a + n b V b/n |
| C. | n a V a + n b V b/2 n |
| D. | n a V a + 2 n b V b/n |
| Answer» C. n a V a + n b V b/2 n | |
| 7. |
A binary mixture of oxygen and nitrogen with partial pressures in the ratio 0.21 and 0.79 is contained in a vessel at 300 K. If the total pressure of the mixture is 1 * 10 5 N/m2, find molar concentration of oxygen |
| A. | 8.42 * 10-1 kg mol/m3 |
| B. | 8.42 * 10-2 kg mol/m3 |
| C. | 8.42 * 10-3 kg mol/m3 |
| D. | 8.42 * 10-4 kg mol/m3 |
| Answer» D. 8.42 * 10-4 kg mol/m3 | |
| 8. |
A_BINARY_MIXTURE_OF_OXYGEN_AND_NITROGEN_WITH_PARTIAL_PRESSURES_IN_THE_RATIO_0.21_AND_0.79_IS_CONTAINED_IN_A_VESSEL_AT_300_K._IF_THE_TOTAL_PRESSURE_OF_THE_MIXTURE_IS_1_*_10_5_N/M2,_FIND_MASS_FRACTION_OF_OXYGEN?$ |
| A. | 0.133 |
| B. | 0.233 |
| C. | 0.333 |
| D. | 0.433 |
| Answer» C. 0.333 | |
| 9. |
A_binary_mixture_of_oxygen_and_nitrogen_with_partial_pressures_in_the_ratio_0.21_and_0.79_is_contained_in_a_vessel_at_300_K._If_the_total_pressure_of_the_mixture_is_1_*_10_5_N/m2,_find_the_average_molecular_weight_of_the_mixture$ |
| A. | 28.84 |
| B. | 29.84 |
| C. | 30.84 |
| D. | 31.84 |
| Answer» B. 29.84 | |
| 10. |
A binary mixture of oxygen and nitrogen with partial pressures in the ratio 0.21 and 0.79 is contained in a vessel at 300 K. If the total pressure of the mixture is 1 * 10 5 N/m2, find overall mass density |
| A. | 4.156 kg/m<sup>3</sup> |
| B. | 3.156 kg/m<sup>3</sup> |
| C. | 2.156 kg/m<sup>3</sup> |
| D. | 1.156 kg/m<sup>3</sup> |
| Answer» E. | |
| 11. |
A binary mixture of oxygen and nitrogen with partial pressures in the ratio 0.21 and 0.79 is contained in a vessel at 300 K. If the total pressure of the mixture is 1 * 10 5 N/m2, find molar concentration of oxygen |
| A. | 8.42 * 10<sup>-1</sup> kg mol/m<sup>3</sup> |
| B. | 8.42 * 10<sup>-2</sup> kg mol/m<sup>3</sup> |
| C. | 8.42 * 10<sup>-3</sup> kg mol/m<sup>3</sup> |
| D. | 8.42 * 10<sup>-4</sup> kg mol/m<sup>3</sup> |
| Answer» D. 8.42 * 10<sup>-4</sup> kg mol/m<sup>3</sup> | |
| 12. |
The ratio of number of moles of species A to the total number of moles of the mixture is known as |
| A. | Mole fraction |
| B. | Mass fraction |
| C. | Partial pressure |
| D. | Mass density |
| Answer» B. Mass fraction | |
| 13. |
For a binary mixture of species A and B, the mass average velocity is defined as |
| A. | 2 p<sub>a</sub> V<sub>a</sub> + p<sub>b</sub> V<sub>b</sub>/ p |
| B. | p<sub>a</sub> V<sub>a</sub> + p<sub>b</sub> V<sub>b</sub>/ p |
| C. | p<sub>a</sub> V<sub>a</sub> + 2 p<sub>b</sub> V<sub>b</sub>/ p |
| D. | p<sub>a</sub> V<sub>a</sub> + p<sub>b</sub> V<sub>b</sub>/ 2 p |
| Answer» C. p<sub>a</sub> V<sub>a</sub> + 2 p<sub>b</sub> V<sub>b</sub>/ p | |
| 14. |
The ratio of a mass concentration of species A to the total mass density of the mixture is known as |
| A. | Mass density |
| B. | Concentration |
| C. | Mole fraction |
| D. | Mass fraction |
| Answer» E. | |