A gaseous mixture was prepared by taking equal moles of CO and N₂. If the total pressure of the mixture was found to be 1 atmosphere, then the partial pressure of the nitrogen (N₂) in the mixture is:

1.  0.8 atm
2.  0.9 atm
3.  1 atm
4.  0.5 atm

By what factor does the average velocity of a gaseous molecule increase when the temperature (in Kelvin) is doubled?

1.  2.8
2.  4.0
3.  1.4
4.  2.0

The energy absorbed by each molecule (A₂) of a substance is 4.4 x 10^-19 J and bond energy per molecule is 4.0 x 10^-19 J. The kinetic energy of the molecule per atom will be:

1. $2.0\times {10}^{-20}$ $J$

2. $2.2\times {10}^{-19}$ $J$

3. $2.0\times {10}^{-19}$ $J$

4. $4.0\times {10}^{-20}$ $J$

If a gas expands at a constant temperature, it indicates that:

1. Kinetic energy of the molecules decreases

2. The pressure of the gas increases

3. The kinetic energy of the molecules remains the same

4. The number of molecules of gas increases

50 mL of each gas A and of gas B takes 200 and 150 s respectively for effusing through a pinhole under the similar conditions. If the molecular mass of gas B is 36, the molecular mass of gas A will be:

1. 96

2. 128

3. 32

4. 64

Equal masses of H₂, O₂ and CH₄ have been taken in a container of volume V at temperature 27 ºC in identical conditions. The ratio of the volumes of gases H₂:O₂ : CH₄ would be:

1. 8:16:1
2. 16:8:1
3. 16:1:2
4. 8:1:2

A gas such as carbon monoxide would be most likely to obey the ideal gas law at?
1. High temperature and low pressure
2. Low temperature and high pressure
3. High temperature and high pressure
4. Low temperature and low pressure

A certain gas takes three times as long to effuse out as helium. Its molecular mass will be:

1.  36 u
2.  64 u
3.  9 u
4.  27 u