Question : Helium is added to the oxygen supply of deep-sea divers because it is
Option 1: less poisonous than nitrogen
Option 2: lighter than nitrogen
Option 3: readily miscible with oxygen
Option 4: less soluble in blood than Nitrogen at high-pressure
Correct Answer: less soluble in blood than Nitrogen at high-pressure
Solution : The correct option is less soluble in blood than Nitrogen at high pressure .
Helium is added to the breathing mixtures of deep-sea divers and underwater workers for a specific reason: it is less soluble in blood than nitrogen at high pressures. This property helps prevent a condition known as Nitrogen Narcosis, which can occur when nitrogen dissolves in the bloodstream at high pressures and affects the nervous system, leading to confusion and impaired judgment due to alcohol intoxication.
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