A) Methane
B) Nitrogen
C) Oxygen
D) Hydrogen
Correct Answer: B
Solution :
[b] The atmosphere of Titan is the layer of gases surrounding Titan, the largest moon of Saturn. It is the only thick atmosphere of a natural satellite in the Solar System. The atmospheric composition in the stratosphere is 98.4%nitrogen?the only dense, nitrogen-rich atmosphere in the Solar System aside from Earth's?with the remaining 1.6% composed of mostly of methane (1.4%) and hydrogen (0.1-0.2%). Because methane condenses out of Titan's atmosphere at high altitudes, its abundance increases as one descends below the tropopause at an altitude of 32 km, leveling off at a value of 4.9% between 8 km and the surface,
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