Question

Which gas has the highest critical temperature among nitrogen,ammonia,water vapour andcaarbon diaoxide?

Answer 1

here is the answer

Critical temperature is directly proportional to the attraction between individual atoms. In NH3 there is high attractive forces due to H bonding. Thus Tc for Nh3 is highest followed by CO2,CH4 and H2

Answer 2

The answer is water vapour due to high forces of attraction in water vapour Which is larger than that in Ammonia