On what basis do you classify gases into permanent and temporary gases ? Expalin these types with example.

On what basis do you classify gases into permanent and temporary gases

1.	On what basis do you classify gases into permanent and temporary gases ? Expalin these types with example.
Answer» SOLUTION :BASED on the values of the critical temperature, the gasesare calassified into permanent and temporary gases. (i) Gases having very low critical temperature belongs to permanent type. Eg: `H_(2), N_(2), He, ETC`. (ii) Gases having critical temperature is the ordinary range of temperatues belongs to the temporary type Eg: `NH_(3),CO_(2), SO_(2),HCl` etc.