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Monday, 17 August 2026
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Physics Past Questions and Answers

Topic: Diffusion

Jamb Physics Questions - Diffusion

Question 21:
During the transformation of matter from the solid to the liquid state, the heat supplied does not produce a temperature increase because
  • A The heat energy is quickly conducted away
  • B The heat capacity has become very large as the substance melts
  • C The heat gained is equal to the heat lost by the substance
  • D All the heat is used to break the bonds holding the molecules of the solid together
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Question 22:
A solid weighs 10.00N in air, 6N when forcefully immersed in water, and 7.0N when fully immersed in a liquid, X. Calculate the relative density of the liquid X.
  • A \(\frac{5}{3}\)
  • B \(\frac{4}{3}\)
  • C \(\frac{3}{4}\)
  • D \(\frac{7}{10}\)
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Question 23:
Which of the following is not correct about the molecules of a substance in a gaseous state. They?
  • A Are in a constant state of motion
  • B Have different speeds
  • C Have a temperature which is measured by the average kinetic energy
  • D The collision between the gases is perfectly inelastic
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