Gas Laws - Jamb Physics Past Questions and Answers

Question 6:

• JAMB 1981

a balloon inflated with helium gas at ground level is released. As it rises through a constant temperature atmosphere.

A. Its pressuren reduces but volume remains constant
B. Te product of pressure and volume remains constant
C. Both pressure and volume increases
D. Its pressure remains constant but the volume decreases
E. Both pressure and volume remains constant

Question 7:

• JAMB 1982

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

Question 8:

• JAMB 1982

The equation P^xV^yT^z = constant

A. X = 0, y = 0, z = 1
B. X = 1, y = 0, z = 0
C. X = 1, y = 1, z = 0
D. X = 1, y = 1, z = 1
E. X = 1, y = 1, z = -1

Question 9:

• JAMB 1983

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. 25cm³
B. 50cm³
C. 100cm³
D. 200cm³
E. 400cm³

Question 10:

• JAMB 1984

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%