Question : Which of the following was to be discovered first in the chromospheres of the sun?
A. Helium
B. Neon
C. Xenon
D. Krypton
Question Listed : Helium, Elements, Metals,
Question : The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is
A. Krypton
B. Helium
C. Xenon
D. Argon
Question Listed : Helium, Elements, Metals,
Question : Balloons are filled with
A. argon
B. oxygen
C. helium
D. nitrogen
Question Listed : Helium, Elements, Metals,
Question : For respiration in deep sea, divers use mixture of
A. Oxygen and nitrogen
B. Oxygen and carbon dioxide
C. Oxygen and hydrogen
D. Oxygen and helium
Question Listed : Gas, Helium, Oxygen,