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Sunday, 16 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 26:
In a radioactive series
\( ^{235} _{92}L \to ^{235} _{92}M \to ^{231} _{90}N \to ^{231} _{91}\phi \)
The particles emitted are respectively
  • A \( \beta , \beta , \alpha \)
  • B \( \alpha , \gamma , \beta \)
  • C \( \gamma , \alpha , \beta \)
  • D \( \alpha , \alpha , \beta \)
  • E \( \beta , \alpha , \beta \)
View Answer & Explanation
Question 27:
Which of the following statements is true about liquid pressure is NOT correct? The pressure
  • A At a point in a liquid is proportional to the depth
  • B At any point in a liquid is the same at the same level
  • C Is exerted equally in all directions at any point
  • D Of a liquid at any point on the wall of its container acts in a direction perpendicular to the wall
  • E At a particular depth depends on the shape of the vessel
View Answer & Explanation
Question 28:
If the pressure on 100cm3 of an ideal gas is doubled while its kelvin temperature is halved, then the new volume of the gas will become
  • A 25cm<sup style='font-size: smaller;'>3</sup>
  • B 50cm<sup style='font-size: smaller;'>3</sup>
  • C 100cm<sup style='font-size: smaller;'>3</sup>
  • D 200cm<sup style='font-size: smaller;'>3</sup>
  • E 400cm<sup style='font-size: smaller;'>3</sup>
View Answer & Explanation
Question 29:
Which of the following statements is (are) NOT correct? i. pressure changes do not affect the speed of sound in air ii. the velocity of sound increases with temperature iii. the quality of the note depends only on its frequency
  • A I only
  • B Ii only
  • C Iii only
  • D I and iii
  • E Ii and iii
View Answer & Explanation
Question 30:
Dewpoint is the temperature at which, water vapour in the atmosphere
  • A Turns into steam
  • B Solidifies into ice pellets
  • C First condenses into liquid form
  • D Is just sufficient to cause cooling
  • E Has a relative humidity of fifty percent
View Answer & Explanation