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Chemistry miscellaneous
  1. The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing is
    1. Neon
    2. Krypton
    3. Argon
    4. Helium
Correct Option: D

Helium is used by deep sea divers because it reduces the narcosis of nitrogen and it remains below the oxygen toxicity limits. In fact, they use tri mix of Oxygen, helium and a little bit of nitrogen.


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