Oxygen from the atmosphere is used up in processes, namely:
Combustion
Forming oxides of nitrogen
All of the above
Respiration
A
Forming oxides of nitrogen
B
Respiration
C
Combustion
D
All of the above
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Solution
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Oxygen is one of the most important elements of the Earth's atmosphere. It is consumed by every living creature in every natural process.
In respiration, living organisms take in oxygen to generate energy from the food that they eat.
Any combustion reaction requires oxygen.
Forming oxides of any element requires oxygen.
Therefore, the correct answer is option D.
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