Question

Deep sea divers use $(O_2+He)$ mixture as preference to $(O_2+N_2)$ mixture. This is because:

• A. helium is lighter than nitrogen.
• B. helium is less soluble in blood than nitrogen.
• C. helium is more soluble in blood.
• D. helium provides a better inert atmosphere than nitrogen.

Answer 1

The correct option is B helium is less soluble in blood than nitrogen.

Deep-sea divers prefer using the mixture of oxygen and helium to reduce the proportion of nitrogen and oxygen mixture. At high external pressure, the nitrogen mixed with blood, which then changes to toxic chemicals, which is fatal.

However, in the case of helium and oxygen mixture, even if helium gets mixed with blood it will not cause any problem as helium is inert.