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Byju's Answer
Standard XII
Chemistry
Preparation of Dioxygen
If a large nu...
Question

If a large number of people are enclosed in a room, then

A
Oxygen decreases and carbon dioxide increases
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B
Oxygen increases and carbon dioxide decreases
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C
Both oxygen and carbon dioxide decrease
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D
Both oxygen and carbon dioxide increase
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Solution

The correct option is A Oxygen decreases and carbon dioxide increases
If a large number of people are enclosed in a room, then oxygen will be used for their respiration and carbon dioxide will be produced and released in to the room. So, the amount of oxygen will be decreased and the carbon dioxide will be increased.

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Preparation of Dioxygen
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