CFCs and the Ozone Hole
CFCs and the Ozone Hole
CFCs and the Ozone Hole:
High above the surface of the earth, there is a layer in the atmosphere that is rich in ozone (). Ozone, which is made up of three atoms of oxygen, affects our respiratory system. However, the layer of ozone in the atmosphere protects us by absorbing the ultraviolet (UV) radiation from the sun. This prevents the harmful UV radiation from reaching the surface of the earth. Ultraviolet radiation can cause skin cancer and cataract. It also affects plants.
Formation of Ozone Layer:
Ozone is formed at the higher levels of the atmosphere. When UV radiation falls on oxygen molecules, the high energy of UV radiation splits molecular oxygen () into free oxygen (O) atoms. These atoms then combine with molecular oxygen to form ozone.
Unfortunately, the amount of ozone in the ozone layer is being depleted due to the release of certain chemicals into the atmosphere. Among these chemicals are chlorofluorocarbons (CFCs), which are made of carbon, fluorine and chlorine. CFCs are used in air-conditioners, refrigerators, aerosol sprays, shaving foam, fire extinguishers, etc.
The United Nations Environment Programme (UNEP) brought forward an agreement in ______________ to freeze the CFC production at the 1986 level. | |||
| Right Option : A | |||
| View Explanation | |||
Which of the following gases can destroy the ozone layer by reacting with it? | |||
| Right Option : C | |||
| View Explanation | |||
CFC chemicals are _________________ | |||
| Right Option : A | |||
| View Explanation | |||
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Om Umang
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10thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
