Chemistry S and P - Block Elements (S - Block Elements Not In Syllabus ) Noble Gases Single Correct MCQ
Published on: August 11, 2026

Deep sea divers used to respirate is a mixture of

A
Oxygen and argon
B
Oxygen and helium
C
Oxygen and nitrogen
D
Oxygen and hydrogen

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Verified by Experts
The correct answer is:
B

An oxygen-helium mixture is used artificial respiration in deep sea diving instead of air because nitrogen

present in air dissolves in blood under high pressure when sea diver goes into deep sea. When he comes to the surface, nitrogen bubbles out of the blood due to decrease in pressure, causing pains. This disease is called “bends”.

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