Synthesis of proteins by plants – Plants directly or indirectly use nitrogen from the air for making proteins.
In the manufacture of ammonia – Nitrogen is used in the manufacture of ammonia by the Haber process.
In the manufacture of explosives – Most of the chemical explosives contain nitrogen, for example, trinitrotoluene (TNT) and nitroglycerine.
In hospitals – Liquid nitrogen in used in hospitals for storing and preserving blood, tissues, etc. as it provides a very low temperature.
In the food industry – Because of its inert nature, nitrogen is used in food packaging. The containers used for storing food stuff are flushed with nitrogen to remove oxygen before they are sealed. It stops bacterial growth chances and preserve food. Liquid nitrogen is also used for preserving foods such as cakes and pastries.
In the manufacture of fertilizers – such as urea, ammonium sulphate, ammonium phosphate.
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