The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is ________ ?
Correct answer: C. Helium
- A. Argon
- B. Xenon
- C. Helium
- D. Krypton
Explanation
Helium is mixed with oxygen for deep-sea diving because it is much less soluble in body tissues than nitrogen and reduces nitrogen narcosis and decompression sickness. The other noble gases are unsuitable for this purpose.
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