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JAMB Physics 2007 Question 29

Question 29

Structure of Matter and Kinetic Theory

I. Mass II. Density III. Temperature IV. Nature of substance.
Which of the above affect diffusion?

  1. A.I, II and IV only
  2. B.II, III and IV only
  3. C.I, II, III and IV.
  4. D.I and II only.
Show the answer and explanation

Answer: C (I, II, III and IV.)

Explanation

Lighter, less dense molecules diffuse faster (Graham's law), molecules move faster at higher temperature, and diffusion is quicker in gases than in liquids. So mass, density, temperature and the nature of the substance all matter.