Multiple choice

CO reduces the oxygen-carrying capacity of blood. Which of the following gases can also cause the same harmful effect on humans?

  1. Sulphur oxide

  2. Carbon dioxide

  3. Sulphur trioxide

  4. Ozone gas

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sulphur trioxide can combine with hemoglobin and reduce the oxygen-carrying capacity of blood.