Question

The lower part of exosphere contains

• A. Carbon zone
• B. Ozone zone
• C. Nitrogen zone
• D. Helium zone

Answer 1

The correct option is D Helium zone

Exosphere is the outer fringe of Earth's atmosphere, which extends some 20000 miles from the planet. It's dominant element is hydrogen and its temperature ranges from ${200}^{0}F$ to ${1000}^{0}F$. The lower part of exosphere contains abundance of helium besides hydrogen and is called as “helium zone”. Hence, option D is correct.