Question
Chemistry Question on p -Block Elements
Deep sea divers used to respirate a mixture of
A
Oxygen and argon
B
Oxygen and helium
C
Oxygen and nitrogen
D
Oxygen and hydrogen
Answer
Oxygen and helium
Explanation
Solution
An oxygen- helium mixture is used for 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 pain. This disease is called "bends".