Which of the following causes death by asphyxiation, if its presence in atmospheric air exceeds maximum allowable concentration (i.e. 50 ppm) ?

Question

Which of the following causes death by asphyxiation, if its presence in atmospheric air exceeds maximum allowable concentration (i.e. > 50 ppm) ?

Accepted Answer

Carbon monoxide. Carbon monoxide (CO) is a common gas that causes death by asphyxiation when its concentration in the air is too high.