Gases

Written by Dr. Ayesha Nadeem (Chemistry)

Class 11 · Chemistry · 9 questions

Name: ____________________ Date: ____________

Charles's law says at constant pressure, the volume of a gas is proportional to its:
- A Mass
- B Celsius temperature
- C Density
- D Absolute temperature
A gas occupies 2 dm3 at 300 K. At constant pressure, its volume at 600 K is:
- A 4 dm3
- B 8 dm3
- C 2 dm3
- D 1 dm3
The ideal gas equation is:
- A P = nRTV
- B PV = RT / n
- C PV = nRT
- D PT = nRV
Graham's law says the rate of diffusion of a gas is inversely proportional to the square root of its:
- A Density or molar mass
- B Temperature only
- C Colour
- D Volume
Real gases behave most like ideal gases at:
- A High pressure and low temperature
- B Low pressure and high temperature
- C Low pressure and low temperature
- D High pressure and high temperature
The pressure of 2 moles of an ideal gas in a 10 dm3 vessel at 300 K is closest to: (R = 0.0821 dm3 atm / K mol)
- A 1 atm
- B 0.49 atm
- C 49 atm
- D 4.9 atm
The SI unit of pressure is the:
- A Atmosphere
- B Bar
- C Torr
- D Pascal
At constant temperature, doubling the pressure of a gas makes its volume:
- A Four times
- B Half
- C The same
- D Double
Absolute zero is:
- A 100 degrees C
- B -100 degrees C
- C -273 degrees C
- D 0 degrees C

Answer key

1. D, 2. A, 3. C, 4. A, 5. B, 6. D, 7. D, 8. B, 9. C