Helium - oxygen mixture is used by deep sea divers in preference to nitrogen-oxygen mixture, because
A. helium is much less soluble in blood than nitrogen
B. nitrogen is much less soluble in blood than helium
C. Due to high pressure deep under sea nitrogen and oxygen react to give poisonous nitric oxide.
D. Nitrogen is highly soluble in water.

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1 Answers

Correct Answer - A
At high pressure, He is much less soluble than `N_(2)` in blood.

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