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Sunday, 16 August 2026
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Physics Past Questions and Answers

Topic: Pressure exerted by gas

Jamb Physics Questions - Pressure exerted by gas

Question 11:
A rocket burns fuel at the rate of 10kgs-1 and ejects it with velocity of 5 x 103ms-1. The thrust exerted by the gas on the rock is
  • A 2.5 x 10<sup style='font-size: smaller;'>7</sup>N
  • B 5.0 x 10<sup style='font-size: smaller;'>4</sup>N
  • C 5.0 x 10<sup style='font-size: smaller;'>2</sup>N
  • D 2.0 x 10<sup style='font-size: smaller;'>-3</sup>N
View Answer & Explanation
Question 12:
When the volume of a given mass of gas is halved and its temperature doubled, the pressure
  • A Remains constant
  • B Increases by a factor of 4
  • C Increases by a factor of 3
  • D Decreases by a factor of 4
View Answer & Explanation
Question 13:
A gas has a volume of 100cm3 at 27oC. If it is heated to temperature T until a final volume of 120cm3 is attained, calculate T
  • A 33<sup style='font-size: smaller;'>o</sup>C
  • B 60<sup style='font-size: smaller;'>o</sup>C
  • C 87<sup style='font-size: smaller;'>o</sup>C
  • D 114<sup style='font-size: smaller;'>o</sup>C
View Answer & Explanation
Question 14:
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
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Question 15:
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