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प्रश्न
The depletion of ozone layer in the upper atmosphere is mainly due to the emission of :
(a) unburnt hydrocarbons
(b) chlorofluorocarbons
(c) greenhouse gases
(d) ultraviolet radiations
उत्तर
chlorofluorocarbons
Chlorofluorocarbons emitted by air-conditioners, refrigerators and jet planes cause the depletion of the ozone layer.
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संबंधित प्रश्न
Which radiations are absorbed by ozone layer?
What would happen if the ozone layer in the atmosphere completely disappears?
How Ozone is Formed?
Briefly explain depletion of ozone layer and its effects.
‘There is a hole in the ozone layer’. What do you understand by this?
Give balanced equation for the following conversion [one or two steps].
Oxygen to ozone gas by photolysis.
Give reason for the following:
The formation of ozone involves a chemical reaction called photolysis.
Name or state the following:
An atmospheric pollutant responsible for both global warming and ozone depletion.
Which of the following may be a conclusion of the excessive exposure of humans to sun’s ultraviolet rays?
- Peptic ulcers
- Eye disease like cataract
- Damage to lungs
- Skin cancer
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.
