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Tuesday, 18 August 2026
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Physics Past Questions and Answers

Topic: Structure of Matter and Kinetic Theory

Jamb Physics Questions - Structure of Matter and Kinetic Theory

Question 86:
When temperature of a liquid increases, its surface tension
  • A Decreases
  • B Increases
  • C Remain Constant
  • D Increases then decreases
View Answer & Explanation
Question 87:
A gas at a volume of V0 in a container at pressure P0 is compressed to one-fifth of its volume. What will be its pressure if the magnitude of its original temperature T is constant?
  • A P<sub style='font-size: smaller;'>0</sub>/5
  • B 4P<sub style='font-size: smaller;'>0</sub>/5
  • C P<sub style='font-size: smaller;'>0</sub>
  • D 5P<sub style='font-size: smaller;'>0</sub>
View Answer & Explanation
Question 88:
In the Rutherford scattering experiment, a beam of alpha particles was fired at a thin gold film with some of the particles being considerably deflected. This shows that
  • A A gold nucleus contains protons, neutrons and electrons uniformly distributed in a tiny volume
  • B The gold nucleus is positively charged and is concentrated in a tiny volume
  • C The gold nucleus emitted alpha particles
  • D The gold nucleus is concentrated in a tiny volume and contains alpha particles
View Answer & Explanation
Question 89:
In the J-tube above, Y and X are on the same horizontal level and 30cm3 of air is trapped above Y when the atmospheric pressure is 75cm Hg, calculate the volume of air trapped above Y when 15cm Hg is now poured into the limb above X
  • A 15 cm<sup style='font-size: smaller;'>3</sup>
  • B 25 cm<sup style='font-size: smaller;'>3</sup>
  • C 35 cm<sup style='font-size: smaller;'>3</sup>
  • D 45 cm<sup style='font-size: smaller;'>3</sup>
View Answer & Explanation
Question 90:
If the fraction of the atoms of a radioactive material left after 120years is 1/64, what is the half-life of the material?
  • A 24 years
  • B 20 years
  • C 10 years
  • D 2 years
View Answer & Explanation