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Question

Which one of the following gases is found in highest quantity in Exosphere?

A
Hydrogen
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B
Helium
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C
Nitrogen
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D
Oxygen
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Solution

The correct option is A Hydrogen
The exosphere is the uppermost region of Earth's atmosphere as it gradually fades into the vacuum of space. It starts at an altitude of about 500 km and goes out to about 10,000 km. The most abundantly found gas in exosphere is hydrogen with some helium, carbon dioxide, and atomic oxygen near its base.

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