CBSE Class 12-science Answered
ozone is heavier than oxygen molecule but it is present above it.why?
Asked by SHREYA | 04 Apr, 2013, 10:23: PM
Expert Answer
In nature, there is a cycle of oxygen just like there is a cycle of water. Oxygen is released from plants on land and plankton in the sea during photosynthesis. The oxygen is lighter than air and floats upward in the atmosphere. At the 20-30 km region (12 to 18 miles), strong ultraviolet radiation in the 185-200 nanometer wavelength bombards the oxygen and turns some of it into ozone. The ozone created exists as a thin layer in the atmosphere and it blocks out the small portion of the UV spectrum that it absorbs.
Ozone is produced constantly in the upper atmosphere as long as the sun is shining, and since ozone is heavier than air, it begins to fall earthward. As it falls, it combines with any pollutant it contacts, cleaning the air - nature's wonderful self-cleaning system. If ozone contacts water vapor as it falls, it forms hydrogen peroxide, a component of rainwater, and the reason why rainwater causes plants to grow better than irrigation.
Answered by | 05 Apr, 2013, 10:15: AM
Concept Videos
-
Food Additives - Chemicals in our food
This Video explains about food additives and cleansing agents. -
Therapeutic action of drugs - Part 1
This video explains therapeutic action of drugs. -
About food additives and cleansing agents ...
Food additives and cleansing agents -
Therapeutic action of drugs - Part 2
The video explains therapeutic action of drugs. -
Exam prep strategies on food additives and cleansing ag ...
This video focuses on the exam prep strategies of Food additives and cleans...
CBSE 12-science - Chemistry
Asked by umeshts142 | 12 Oct, 2021, 06:19: PM
ANSWERED BY EXPERTCBSE 12-science - Chemistry
Asked by ajaysankhala051 | 10 Feb, 2020, 01:00: AM
ANSWERED BY EXPERTCBSE 12-science - Chemistry
Asked by bcnandi | 09 Jul, 2019, 07:36: PM
ANSWERED BY EXPERTCBSE 12-science - Chemistry
Asked by bhatnagardrpiyush | 18 Jun, 2019, 04:50: PM
ANSWERED BY EXPERTCBSE 12-science - Chemistry
Asked by pardeepkumar2281 | 03 Oct, 2018, 07:49: PM
ANSWERED BY EXPERTCBSE 12-science - Chemistry
Asked by chaitanyakarthik777 | 17 Aug, 2018, 09:28: PM
ANSWERED BY EXPERTCBSE 12-science - Chemistry
Asked by Atulcaald | 31 May, 2018, 09:43: PM
ANSWERED BY EXPERTCBSE 12-science - Chemistry
Asked by Topperlearning User | 22 Jun, 2016, 11:05: AM
ANSWERED BY EXPERTCBSE 12-science - Chemistry
Asked by Topperlearning User | 22 Jun, 2016, 11:07: AM
ANSWERED BY EXPERTCBSE 12-science - Chemistry
Asked by Topperlearning User | 22 Jun, 2016, 11:45: AM
ANSWERED BY EXPERT
