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Question
What is wrong in the statement ?
“We breathe in oxygen and breathe out carbon dioxide”?
“We breathe in oxygen and breathe out carbon dioxide”?
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Solution
This statement is wrong because the air we inhale has more oxygen and less carbon dioxide.
The air we exhale has higher concentration of carbon dioxide and lesser concentration of oxygen than in inhaled air.
Gas
% in inspired air
% in expired air
Oxygen
20.96
16.4
Carbon dioxide
0.04
4
Nitrogen
79
79.6
The air we exhale has higher concentration of carbon dioxide and lesser concentration of oxygen than in inhaled air.
| Gas | % in inspired air | % in expired air |
| Oxygen | 20.96 | 16.4 |
| Carbon dioxide | 0.04 | 4 |
| Nitrogen | 79 | 79.6 |
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