Which of the following gases in the atmosphere is used up in three process: combustion, respiration and in the formation of oxides of nitrogen?

Correct option is C

Sol: The correct answer is (c) Oxygen

Key Points:

​The gas used up in combustion, respiration, and the formation of oxides of nitrogen is oxygen ($$O_2$$​)

• ​Combustion: This process involves burning fuels in the presence of oxygen, leading to the production of heat and various gases, primarily carbon dioxide (CO2) and water vapor (H2O) as byproducts. Oxygen is essential for combustion reactions to occur.
• Respiration: Living organisms consume oxygen during cellular respiration, a process that converts glucose into energy, producing carbon dioxide as a waste product. This process is vital for the survival of animals, plants, and many microorganisms
• Formation of Oxides of Nitrogen: During combustion processes, particularly at high temperatures, nitrogen from the air reacts with oxygen to form nitrogen oxides (NOx), which include nitrogen monoxide (NO) and nitrogen dioxide (NO2). These reactions contribute to air pollution and are significant in various environmental processes