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Everyday Science Mcqs

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

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

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.

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

Everyday Science Mcqs

Chemical formula for Water is _______ ?

Chemical formula for Water is _______ ?

A. NaAlO2
B. H2O
C. Al2O3
D. CaSiO3

Water is a chemical substance with the chemical formula H2O. Its molecule contains one oxygen and two hydrogen atoms connected by covalent bonds. Water is an inorganic, transparent, tasteless, odorless, and nearly colorless chemical substance, which is the main constituent of Earth’s hydrosphere, and the fluids of most living organisms. It is vital for all known forms of life, even though it provides no calories or organic nutrients.

Chemical formula for Water is _______ ? Read More »

Everyday Science Mcqs, General Knowledge MCQs