Multiple choice general knowledge science & technology

The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is

  1. Argon

  2. Xenon

  3. Helium

  4. Krypton

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Deep sea divers breathing compressed air can experience nitrogen narcosis. Helium is substituted for nitrogen in breathing mixtures because it's inert and doesn't cause narcosis, allowing divers to work at greater depths safely.