Air at a very low temperature turns into a liquid state. Liquid air is colourless, tasteless and odourless. It is extensively used to liquefy natural gas and liquid oxygen. East Regional Laboratories, P.C.S.I.R., Dacca have installed an Air Liquefaction Plant. With the coming up and expansion of steel and petrochemical industries, the demand for liquid air is likely to shoot up many times, giving to the home industry a fillip.