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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 1:
A quantity of sungas at -133[/sup] occupies 1/3m[sup]3 under pressure 1.4 x 105 Nm-2. if the gas occupies 31 m-2 at 37oC, its pressure will be
  • A 1.26 x 10<sup style='font-size: smaller;'>3</sup>Nm<sup style='font-size: smaller;'>-2</sup>
  • B 3.3 x10<sup style='font-size: smaller;'>4</sup>Nm<sup style='font-size: smaller;'>-2</sup>
  • C 1.35 x 10<sup style='font-size: smaller;'>4</sup>Nm<sup style='font-size: smaller;'>-2</sup>
  • D 2.2 x 10<sup style='font-size: smaller;'>4</sup>Nm<sup style='font-size: smaller;'>-2</sup>
  • E 10<sup style='font-size: smaller;'>5</sup>Nm<sup style='font-size: smaller;'>-2</sup>
View Answer & Explanation
Question 2:
The tyre pressure of a car was found to be 150cmHg in the morning at a temperature of 27°C. Hard driving in the afternoon raised the temperature of the tyres by 57°C. The tyre pressure had by the afternoon was
  • A Increased by 15.0cm Hg
  • B Decreased by 15.0cm Hg
  • C Increased by 22.50cm
  • D Decreased by 22.50cm Hg
  • E Remained constant
View Answer & Explanation
Question 3:
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 4:
A given mass of an ideal gas occupies a volume V at a temperature T and under a pressure p. If the pressure is increased to 2p and the temperature reduced to \(\frac{1}{2T}\), then the percentage change in the volume of the gas is
  • A 0%
  • B 25%
  • C 75%
  • D 300%
  • E 400%
View Answer & Explanation
Question 5:
A 0.05kg bullet travelling at 500ms-1 horizontally strikes a thick vertical wall. It stops after penetrating through the wall horizontal distance of 0.25m. What is the magnitude of the average force the wall exerts on the bullet?
  • A 25N
  • B 50N
  • C 250N
  • D 500N
  • E 25 000N
View Answer & Explanation