Gas Laws - Jamb Physics Past Questions and Answers

Question 31:

• JAMB 2010

The pressure of one mole of an ideal gas of volume 10^-2 m³ at a temperature of 27°c is
[molar gas constant = 8.3 J mol^-1 k^-1]

A. 2.49 x 10⁴ Nm^-2
B. 2.24 x 10⁴ Nm^-2
C. 2.49 x 10⁵ Nm^-1
D. 2.24 x 10⁵ Nm^-1

Question 32:

• JAMB 2010

THe velocity of sound in air at 16^oC is 340ms^-1. What will it be when the pressure is doubled and its temperature raised to 127^oC?

A. 400 ms^-1
B. 4,000 ms^-1
C. 8,000 ms^-1
D. 160,000 ms^-1

Question 33:

• JAMB 2011

If the volume of a gas increases steadily as the temperature decreases at constant pressure, the gas obeys

A. Graham's Law
B. Boyle's Law
C. Pressure law
D. Charles Law
E. No Correct Option

Question 34:

• JAMB 2012

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. P₀/5
B. 4P₀/5
C. P₀
D. 5P₀

Question 35:

• JAMB 2012

The pressure of a given mass of a gas changes from 200Nm^-2 to 120Nm^-2 while the temperature drops from 127°C to -73°C. The ratio of the final volume to the initial volume is

A. 2 : 5
B. 5 : 4
C. 5 : 2
D. 4 : 5