| 1. It extends from the earth's surface up to an altitude of 80-90 km. |
| 2. It has heterogeneous chemical composition. |
| 3. Kennedy- Heaviside layer is an important part of ionosphere. |
| 4. This part of the atmosphere is a function of revolutionary process in the atmosphere. |
A) Only 1 is correct
B) Only 1 and 2 are correct
C) Only 1, 2 and 3 are correct
D) 1, 2, 3 and 4 are correct.
Correct Answer: A
Solution :
Homosphere is characterized by uniformity of chemical composition. It has three layers namely troposphere, stratosphere and mesosphere and Kennedy-Heaviside layer belongs to hetero sphere which extends above homosphere. This part of the atmosphere is not a function of revolutionary process of the atmosphere.
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