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प्रश्न
Which pollutant released into the air during refrigeration and airconditioning is the greatest contributor to the depletion of ozone layer?
(a) BHC
(b) DDT
(c) CFC
(d) UNEP
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उत्तर
CFC
Chlorofluorocarbons (CFCs) are released into the air during refrigeration and air conditioning and are the greatest contributor to the depletion of the ozone layer.
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संबंधित प्रश्न
How does ozone affect any ecosystem?
Why is damage to the ozone layer a cause for concern? What steps are being taken to limit this damage?
Fill in the following blank with suitable word :
Ultraviolet rays can cause skin..............
What are the causes of depletion of ozone layer?
What would happen if the ozone layer in the atmosphere completely disappears?
Which class of carbon compounds is responsible for the depletion of ozone layer at the higher level of the atmosphere?
“Damage to the ozone layer is a cause of concern”. Justify this statement.
Explain what is smog. Give its effects.
Name the following pollutants:
Any two chemicals leading to the formation of ozone holes.
Match the items in column I with the closely related ones in column II.
| Column I | Column II | ||
| (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 |
State two effects of ozone depletion.
What is Ozone?
Discuss in detail the process of ozone depletion.
State the role of chlorofluorocarbons in ozone destruction or depletion [no equations required].
Select the correct answer from the following statement:
A chemical responsible for ozone depletion.
Long answer type question
Montreal protocol is an essential step. Why is it so?
Gas A, found in the upper layers of the atmosphere, is a deadly poison but is essential for all living beings. The amount of this gas started declining sharply in the 1980s.
- Identify Gas A. How is it formed at higher levels of the atmosphere?
- Why is it essential for all living beings? State the cause for the depletion of this gas.
Why is ozone layer getting depleted at the higher levels of the atmosphere? Mention one harmful effect caused by its depletion.
World Ozone day is celebrated on ______.
Write the full form of CFCs.
