Oxygen is essential for breathing; Helium is used to dilute oxygen and replace nitrogen in breathing gases for deep diving to mitigate the effects of pressure.
The gases employed for respiratory activities of divers are
Asked in UPPSC Upper Mains 2014 · Topic: Sulphur, Nitrogen, Halogen, Inert Gases (Inert Gases (Noble Gases): Occurrence, isolation, general characteristics, and uses)
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