Given van der Waals’ constant for NH₃ , H₂, O₂ and CO₂ are respectively 4.17, 0.244, 1.36 and 3.59, which one of the following gases is most easily liquefied?

The correction factor ‘a’ to the ideal gas equation corresponds to

Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. What fraction of the oxygen escapes in the time required for onehalf of the hydrogen to escape?

A gas such as carbon monoxide would be most likely to obey the ideal gas law at