Multiple choice

Which of the following gases can cause death by suffocation, if present in excess amount in surroundings?

  1. CO

  2. CO2

  3. SO2

  4. NO2

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

Carbon monoxide has high affinity for haemoglobin. If it is present in excess amount in surroundings, it replaces oxygen from oxy-haemoglobin and cause death.