Everyday Science Mcqs


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

a. Argon
b. Xenon
c. Helium
d. Krypton


ANSWER: See Answer
 
Heliox is a mixture of oxygen and helium and is often used in the deep phase of a commercial deep dive to eliminate nitrogen narcosis. Heliair is a form of trimix that is easily blended from helium and air without using pure oxygen. It always has a 21:79 ratio of oxygen to nitrogen; the balance of the mix is helium.
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