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Question

Which element from the atmosphere is a part of all the processes: respiration, combustion, and formation of oxides of nitrogen?

A
Oxygen
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B
Nitrogen
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C
Carbon dioxide
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D
Carbon
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Solution

The correct option is B Oxygen
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 A.

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