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Friday, 22 May 2026
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Physics Past Questions and Answers

Jamb 1998 Physics Questions

Question 21:
How many grams of water at 17oC must be added to 42g of ice at 0oC to melt the ice completely? [specific latent heat of fusion of ice = 3.4 x 105Jkg-1, specific heat capacity of water = 4200Jkg-1k-1]
  • A 200g
  • B 300g
  • C 320g
  • D 400g
View Answer & Explanation
Question 22:
A vapour is said to be saturated when
  • A More molecules return to the liquid than the amount that left it
  • B A dynamic equilibrium exists between the molecules of the liquid and the vapour molecules at a given temperature
  • C The vapour pressure is equal to the atmospheric pressure
  • D All molecules are moving with the same speed in all directions at a given temperature
View Answer & Explanation
Question 23:
One valid assumption of the kinetic theory of gasses is the
  • A The molecules of a gas are constantly in a state of motion and the number of collision remains constant
  • B The number of molecule of gas increases with increasing pressure
  • C As the temperature increases, the number of collision made by the gas molecule remains constant
  • D The molecules of gas are all identical and are very small in size
View Answer & Explanation
Question 24:
The physical properties of sound waves can best be described by
  • A Reflection and diffraction
  • B Polarization and reflection
  • C Polarization and diffraction
  • D Polarization and refraction
View Answer & Explanation
Question 25:
In a closed organ pipe producing a musical note, an antinode will always be produced at
  • A The closed end
  • B The open end
  • C The middle
  • D All the parts of the pipe
View Answer & Explanation