Environmental Chemistry - Result Question 26
####4. The regions of the atmosphere, where clouds form and where we live, respectively, are
(2019 Main, 10 April I)
(a) stratosphere and stratosphere
(b) troposphere and troposphere
(c) troposphere and stratosphere
(d) stratosphere and troposphere
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Answer:
Correct Answer: 4. (d)
Solution:
- The lowest region of atmosphere is troposphere which extends upto the height of $10 km$ (approx) from sea level. We live in the tropospheric region. It contains air, water vapour and dust which can form clouds with the help of strong air movement. Above the troposphere, stratospheric region extends upto $50 km$ from sea level. It contains mainly $N _2, O _2, O _3$ and little water vapour. $O _3$ in the stratosphere absorbs $99.5 %$ of the sun’s harmful $UV$ raditions and thus protects the lives on the earth.
