Which of the following is not correct about postulates of the kinetic molecular theory of gases?

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

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

Average molar kinetic energy of CO and N₂ at same temperature is:

1. KE₁ = KE₂

2. KE₁ > KE₂

3. KE₁ < KE₂

4. Can't say anything. Both volumes are not given.