Question : Which among the following is used to dilute oxygen in the gas cylinders used by divers?
Option 1: Krypton
Option 2: Argon
Option 3: Helium
Option 4: Neon
Correct Answer: Helium
Solution : The correct answer is Helium.
Air in oxygen cylinders used by the divers is diluted using Helium because Helium has lower solubility with oxygen even at increased pressures. Normal air contains a lot of Nitrogen, but it is soluble in oxygen at increased pressure under the sea. So to avoid this situation helium containing oxygen cylinders are used by the divers.
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