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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 71:
The volume of an air bubble increases from the bottom to the top of a lake at constant temperature because
  • A Atmospheric pressure acts on the surface of the lake
  • B Pressure increases with depth
  • C Density remains constant with pressure
  • D The bubble experiences an upthrust
View Answer & Explanation
Question 72:
Temperature is the measure of the
  • A Quantity of heat transferred into the molecules of an object
  • B Mean kinetic energy of the molecules of the object
  • C Kinetic energy of any individual molecule of the substance
  • D Amount of work done by the molecules of the object
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Question 73:
A piece of wood floats inside water at room temperature with a fraction of it above the liquid surface. As the temperature of the water is raised, the part of the wood above the liquid will
  • A Decrease because the density of water decreases with temperature
  • B Increase because the density of water decreases with temperature
  • C Decreases because the density of water increases with water temperature
  • D Increase because the density of water increases with temperature
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Question 74:
The equation PxVyTz = constant in charles' law when
  • A X = 1, y = -1, z = 1
  • B X = 0, y = 1, z = -1
  • C X = 1, y = 0, z = -1
  • D X = 0, y = 1, z = 1
View Answer & Explanation
Question 75:
Which of the following statements give the TRUE difference between evaporation and boiling? i. Evaporation occurs at all temperatures while boiling occurs at a fixed temperature for a given pressure. ii. Evaporation is a surface phenomenon while boiling is an interior phenomenon. iii. Evaporation is affected by surface area while boiling is not.
  • A I and ii only
  • B I and iii only
  • C Ii and iii only
  • D I, ii, iii.
View Answer & Explanation