Explore topic-wise MCQs in Mass Transfer.

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
Discussion
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
Discussion
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
Discussion
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.
Discussion
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
Discussion
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
Discussion
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
Discussion
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
Discussion
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
Discussion
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.
Discussion
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>
Discussion
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
Discussion
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
Discussion
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.
Discussion