In modern diving apparatus, a mixture of He and O2 is used - Why ?

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In modern diving apparatus, a mixture of He and O₂ is used - Why ?

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Detailed Solution

A mixture of oxygen - Helium is used as diluent for oxygen respiration mixture by sea-divers. Since helium does not dissolve in blood hence it does not cause a painful sensations called bends, when sea-diver comes out of water.

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