Modes and Diffusion MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Modes and Diffusion, a fundamental topic in the field of Mass Transfer. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Modes and Diffusion MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Modes and Diffusion mcq questions that explore various aspects of Modes and Diffusion problems. Each MCQ is crafted to challenge your understanding of Modes and Diffusion principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Mass Transfer tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Modes and Diffusion MCQs are your pathway to success in mastering this essential Mass Transfer topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Modes and Diffusion. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

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Modes and Diffusion MCQs | Page 2 of 12

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Q11.
A gas mixture containing 21% Oโ‚‚ and 79% Nโ‚‚ flows through a pipe of circular cross-section of diameter 2cm at atmospheric pressure. The velocity of Oโ‚‚ is 0.04m/s and Nโ‚‚ is 0.035m/s.

What is the value of molar average velocity (m/s) of the mixture?
Discuss
Answer: (a).0.036
Q12.
A gas mixture containing 21% Oโ‚‚ and 79% Nโ‚‚ flows through a pipe of circular cross-section of diameter 2cm at atmospheric pressure. The velocity of Oโ‚‚ is 0.04m/s and Nโ‚‚ is 0.035m/s.

What will be the value of mass average velocity (m/s)?
Discuss
Answer: (a).0.981
Q13.
A gas mixture containing 21% Oโ‚‚ and 79% Nโ‚‚ flows through a pipe of circular cross-section of diameter 2cm at atmospheric pressure. The velocity of Oโ‚‚ is 0.04m/s and Nโ‚‚ is 0.035m/s.

What is the value of Volume average velocity?
Discuss
Answer: (a).0.036
Q14.
In a gas mixture if molecular weights of all the species are equal than which one will be more, Mass average velocity or Molar average velocity?
Discuss
Answer: (c).Both will have the same value
Q15.
The velocity of various components of mixture(21% A, 78% B and 1% C) are:
Velocity is in the form: v=xi+yj+zk

Velocity of component A= (0.1, 0, 0)

Velocity of component B= (0, 0.1, 0)

Velocity of component B= (0, 0, 0.1)

Calculate the value of average molar velocity?
Discuss
Answer: (a).(0.021, 0.078, 0.01)
Q16.
The velocity of various components of mixture(21% A, 78% B and 1% C) are:
Velocity is in the form: v=xi+yj+zk

Velocity of component A= (0.1, 0, 0)

Velocity of component B= (0, 0.1, 0)

Velocity of component B= (0, 0, 0.1)

Calculate the value of mass average velocity?
Discuss
Answer: (a).(0.0235, 0.0764, 0.00007)
Q17.
For the calculation of Mass average velocity, which velocity of the molecule is used?
Discuss
Answer: (b).Mean Velocity
Q18.
Which among the following can be the unit of Flux?
Discuss
Answer: (a).Kg*m-2*s-1
Q19.
A molecule in a mixture moves with a velocity of 0.03m/s in (+x) direction. The concentration of the particle is 0.5 mol/liter. A observer is running in (-x) direction with a velocity of 2m/s. calculate the value of molar flux (mol/m².s) relative to the observer.
Discuss
Answer: (d).1015
Q20.
A molecule in a mixture moves with a velocity of 0.03m/s in (+x) direction. The concentration of the particle is 0.5 mol/liter. A observer is running in (-x) direction with a velocity of 2m/s. What will be the value of flux (mol/m².s) with respect to a stationary observer?
Discuss
Answer: (b).15