Question

Inhaling which of these gases reduces the oxygen carrying capacity of the blood?

• A. air utilisation
• B. air pollution
• C. air purification
• D. air conservation

Answer 1

The correct option is C air purification

Haemoglobin combines with oxygen and carries it throughout the blood. But, carbon monoxide (CO) has a much higher rate of combining with the Haemoglobin as compared to oxygen. So, if CO is inhaled in excess, Haemoglobin combines with carbon monoxide instead of oxygen thereby reducing the oxygen carrying capacity of blood.

Oxides of sulphur and nitrogen cause respiratory problems in humans and on reaction with rainwater, form acid rain. And this acid rain cause damage to buildings or structures.