Steady-state, Ordinary Molecular Diffusion MCQ

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• When is fick’s law applied?
  ক

  For passive diffusion down the concentration gradient

  খ

  Passive osmosis along concentration gradient

  গ

  Active osmosis along concentration gradient

  ঘ

  Active and passive movement of molecule along concentration gradient
• Which diffusion occurs when turbulent motion is there?
  ক

  Molar diffusion

  খ

  Eddy diffusion

  গ

  Charge diffusion

  ঘ

  No diffusion
• Why does the diffusion of A with respect to B occur?
  ক

  Due to concentration gradient

  খ

  To to volume gradient

  গ

  Due to velocity gradiet

  ঘ

  Due to change in heat
• Which of the following is FALSE about unimolar diffusion?
  ক

  N b = N a

  খ

  N= N a

  গ

  N a = x a N a – cD ab (dx a /dz)

  ঘ

  X b N a = cD ba (dx b /dz)
• Which of the following is untrue about equimolar diffusion?
  ক

  N a + N b =0

  খ

  J a = J b

  গ

  N=0

  ঘ

  N a = -cD BA (dx b /dz)
• Which of the following formulae is right about molar flux?
  ক

  N a = x A N – D ab (dx a /d z )

  খ

  N a = x A N – (dx a /d z )

  গ

  N a = x A N – cD ab

  ঘ

  N a = x A N – cD ab (dx a /d z )
• What id D ab called in the Fick’s law?
  ক

  Thermal conductivity

  খ

  Density coefficient

  গ

  Diffusivity

  ঘ

  Electrical conductivity
• Which of the following is correct representation of Fick’s law of diffusion?
  ক

  J z = -D*dc a /dz

  খ

  J z = -D*dT/ds

  গ

  J z = D*dc a /dz

  ঘ

  J z = -D*c a /dz
• Which of the following is Fourier law of heat conduction?
  ক

  q z = k*dT z/dZ

  খ

  q z = – k*dT z /dZ

  গ

  q z = k*T z /dZ

  ঘ

  q z = k*dQ z /dZ