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प्रश्न
Select the correct answer from the following statement:
The gas which in presence of U.V. light gives two atoms of the same gas.
विकल्प
Oxygen
Ozone
Carbon dioxide
उत्तर
Oxygen
APPEARS IN
संबंधित प्रश्न
Explain how, harmful ultraviolet radiations of sunlight are prevented from reaching the earth's surface.
Give scientific reasons:
Ozone present in the stratosphere is called as “good ozone”.
Match the items in column I with the closely related ones in column II.
| Column l | Column lI | ||
| (i) | Chlorofluorocarbons (CFCs) | (a) | Global warming |
| (ii) | Fly ash | (b) | Biodegradable |
| (iii) | Cow dung | (c) | Nuclear radiation pollutant |
| (iv) | CO2 and methane | (d) | Acid rain |
| (v) | Sulphur dioxide | (e) | Industrial waste |
| (vi) | Iodine-131 | (f) | Ozone depletion |
How is ozone formed in the upper atmosphere? State its importance. What is responsible for its depletion? Write one harmful effect of ozone depletion.
How is the ‘ozone oxygen cycle’ maintained in the stratosphere and state what disturbs the balance, resulting in ozone depletion or destruction, Give balanced equation for the same.
Global warming is a phenomenon related to ______.
Acid rain is caused by the oxides of ______.
In 1987, the United Nations Environment Programme (UNEP) forged an agreement to freeze the production of a certain chemical to the year 1986 level. Name the chemical and the manufacturing companies m which this chemical was being mostly used.
In what way this chemical damage -
- the upper layers of the atmosphere and ultimately
- the organisms on the earth.
State the essential function performed by ozone at the higher levels of the atmosphere.
Why was there a sharp in the amount of ozone in the atmosphere in 1980's.
