Question

Critical temperature of H2O,NH3,CO2 and O2 are 647K, 405.6K, 304.10K and 154.2K to their critical temperature, the gas that liquifies first is?

Answer 1

Answer : O2

Critical temperature : It is the highest temperature at which gas can liquefy. Above critical temperature, gas can never be change into liquid state.

gas convert into liquid state by cooling or lowering its temperature which decrease the average kinetic energy of molecules which allows gas to convert in liquid form.