Diffusion Mechanisms MCQ

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

• You want to demonstrate the phenomenon of diffusion to a group of school kids using two coloured gases. For this, you need to slow down the process. Which of the following tricks will help you achieve this feat?
  ক

  Cooling the gases

  খ

  Using gases of large molecular weights

  গ

  Decreasing the size of orifice

  ঘ

  All of the mentioned
• Carburisation is a heat treatment used for case hardening steels. Carbon is trapped on steel surface by:
  ক

  Osmosis

  খ

  Interstitial diffusion

  গ

  Vacancy diffusion

  ঘ

  None of the mentioned
• Diffusion is not used in which of the following?
  ক

  Doping of semiconductors

  খ

  Manufacturing of alloys

  গ

  Heat treatment of metals

  ঘ

  Catalysis
• Rate of solid-state diffusion does not depend on which of the following?
  ক

  Temperature

  খ

  Diffusing species

  গ

  Host solid

  ঘ

  Gravity
• Osmosis is different from diffusion as:
  ক

  Diffusion requires semi-permeable membrane

  খ

  Osmosis requires a liquid solvent

  গ

  Osmosis is a form of active transport

  ঘ

  In osmosis, solute moves from lower concentration to higher
• Generally, the metal-to-metal diffusion takes place by vacancy diffusion.
  ক

  True

  খ

  False
• As the temperature rises, the rate of vacancy diffusion in metals:
  ক

  increases

  খ

  decreases

  গ

  remains the same

  ঘ

  may increase or decrease
• Interstitial diffusion is generally faster than diffusion by vacancy mode. This is because:
  ক

  Number of interstitial sites is greater than vacancies

  খ

  Vacancy diffusion requires more energy than interstitial diffusion

  গ

  Interstitial species are smaller than substitution species

  ঘ

  All of the mentioned
• Concentration gradient refers to:
  ক

  Change of concentration with respect to time

  খ

  Change of concentration with respect to space

  গ

  Change of concentration with respect to temperature

  ঘ

  None of the mentioned
• Diffusion is the result of:
  ক

  Random motion of particles

  খ

  Concentration gradient

  গ

  Kinetic energy of particles

  ঘ

  All of the mentioned