Nitrogen is colorless, odorless, and tasteless gas. It is non flammable and will not support combustion.
Atmospheric air contains 78.09% nitrogen, the gas is slightly lighter than air and slightly soluble in water. Nitrogen condenses at its boiling point , -195c to a colorless and odorless liquid that is lighter than water.
When liquid nitrogen is vaporized and than heated to ambient temperature , it absorb a large quantity of heat. Nitrogen is separated from air, by distillation, absorption of diffusion.