The gas mixture used by deep sea divers for respiration is________.

O_{2} + N_{2}

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O_{2} + H e

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X e + O_{2}

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O_{2} + A r

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Solution

The correct option is B $O_{2} + H e$
Deep-sea divers use a mixture of $O_{2}$ and $H e$ for respiration.
Deep-sea divers breathe in a mixture of oxygen and helium to avoid a painful illness called nitrogen narcosis.
Option B is correct.

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(O_{2} + H e)

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Critical temperature(K) 33.2 5.3 154.3 126

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