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.
Depletion of ozone is mainly due to | |||
| Right Option : A | |||
| View Explanation | |||
Which of the following chemicals is linked with the depletion of ozone in the atmosphere? | |||
| Right Option : A | |||
| View Explanation | |||
How many oxygen atoms are present in an ozone molecule? | |||
| Right Option : C | |||
| View Explanation | |||
Students / Parents Reviews [10]
About Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thBeing a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
Prisha Gupta
8thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
7thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Barkha Arora
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
Yatharthi Sharma
10thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
10thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
8thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
