Concentration and Velocity MCQ

Test your knowledge with important Concentration and Velocity MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Concentration and Velocity MCQs at Bissoy

• The mass flow rate of a component in a mixture in X-direction is 2kg/s. The area vector at a particular cross-section is (1.1, 3.2, 5.4) cm2. Calculate the value of flux (kg/cm2.s) through the cross-section.
  ক

  0.31

  খ

  2.2

  গ

  1.82

  ঘ

  6.45
• Under which of the following conditions mass average velocity and molar average velocity are equal?
  ক

  In a very dilute solution

  খ

  If molecular weights of all the species are equal

  গ

  Always different

  ঘ

  In dilute solutions as well as in solutions in which all components have same molecular weights
• In the previous question what will be the value of flux (mol/m2.s) with respect to a stationary observer?
  ক

  0.015

  খ

  15

  গ

  1.015

  ঘ

  1015
• 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.
  ক

  0.015

  খ

  15

  গ

  1.015

  ঘ

  1015
• Which among the following can be the unit of Flux?
  ক

  Kg*m-2*s-1

  খ

  Kg*m2*s-1

  গ

  Kg*m2*s1

  ঘ

  Kg*m*s2
• For the calculation of Mass average velocity, which velocity of the molecule is used?
  ক

  Instantaneous Velocity

  খ

  Mean Velocity

  গ

  Instantaneous Velocity as well as Mean Velocity

  ঘ

  Bulk velocity of the mixture
• Calculate the value of mass average velocity in the previous question?
  ক

  (0.0235, 0.0764, 0.00007)

  খ

  (0.021, 0.078, 0.01)

  গ

  (0.1, 0.1 0.1)

  ঘ

  (0.079, 0.021, 0.01)
• 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?
  ক

  Mass average velocity

  খ

  Molar average velocity

  গ

  Both will have the same value

  ঘ

  Nothing definite can be said
• What is the value of Volume average velocity?
  ক

  0.036

  খ

  0.035

  গ

  0.034

  ঘ

  0.033
• What will be the value of mass average velocity (m/s)?
  ক

  0.981

  খ

  0.891

  গ

  0.985

  ঘ

  0.857
• What is the value of molar average velocity (m/s) of the mixture?
  ক

  0.036

  খ

  0.035

  গ

  0.034

  ঘ

  0.033
• A solution contains 0.3 moles of solute A, 0.2 moles of B and 0.5 moles of C. What will be the mole fraction of A in the mixture?
  ক

  0.3

  খ

  0.2

  গ

  0.5

  ঘ

  1
• Which among the following is always true for mass transfer to occur?
  ক

  Difference in concentration

  খ

  Difference in Pressure

  গ

  Difference in temperature

  ঘ

  Difference in chemical potential
• In which of the following conditions mass transfer will occur spontaneously? C and z is concentration and distance respectively.
  ক

  dC/dz>0

  খ

  dC/dz<0

  গ

  dC/dz=0

  ঘ

  None of the Mentioned