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415

Q:

Helium is added to the oxygen supply of deep-sea divers because:

  • 1
    It is less toxic than nitrogen
  • 2
    It is lighter than nitrogen
  • 3
    It mixes quickly with oxygen
  • 4
    It is less soluble in blood than nitrogen at high pressure
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Answer : 4. "It is less soluble in blood than nitrogen at high pressure"

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