Explain the role oxygen in the following (a) Repiration (b) Cutting and welding ( c) Explosion

Explain the role oxygen in the following (a) Repiration (b) Cutting a

1.	Explain the role oxygen in the following (a) Repiration (b) Cutting and welding ( c) Explosion
Answer» SOLUTION :(i) Respiration : Oxygen is required for repiration of living beings. In respiration burning of GLUCOSE takes place. Oxygen inhaled during respiration is utilized in oxidizing the glucose to carbon dioxide and water, which is accompanied with evolution of energy. `C_(6)H_(12)O_(6)to6CO_(2)+6H_(2)O+"energy"` (ii) Cutting and welding: A mixture of hydrogen and oxygen on burning gives oxy hydrogen flame of `2800^(@)C` temperature. While mixture of hydrogen and acetylene PRODUCES oxy acetylene flame which has `3300^(@)C` temperature. These flames easily melt the metals and hence used for cutting or welding them. (iii) Explosion: A mixture of coal, petroleum jelly liquid oxygen CALLED cartridge is used for blasting ROCKS.