Trouton’s ratio is given by (where λb, = molal heat of vaporisation of a substance at its normal boiling point, kcal/kmol Tb = normal boiling point, °K) ________?

Nitrogen oxides (NOx) is not produced in the ________ industry?

At higher temperatures, molal heat capacities for most of the gases (at constant pressure) ________ with increase in temperature?