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NEET2011ZoologyBreathing and Exchange of GasesActual

Amount of CO ₂ , in expired air is about

Options

  1. A0.04 %
  2. B0.03 %
  3. C4.5 %
  4. D21 %

Correct answer

C. 4.5 %

Step-by-step solution

Amount of CO ₂ in expired air is 4.4 % . The air we breathe in contain about 0.04 % CO ₂ . The air we breathe out contains about 4 % CO ₂ . In other words, exhaled air contains about 100 times the concentratioon of CO ₂ that inhaled air does.

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