CFCs
Trending Questions
What is the main reason of ozone layer depletion?
What is the major cause of air pollution ? Write the various tips for minimising the wastage of petrol / diesel while driving vehicles.
- car
- School bus
- Autorickshaw
- Scooter
Which gas in the upper atmosphere prevents ultraviolet radiations of the sun from reaching the earth?
Boojho wishes to contribute in reducing air pollution. Which vehicle should he use for going to school?
car
school bus
autorickshaw
scooter
Name any chemical that causes depletion of ozone layer.
Which of the following will reach the earth in greater amounts if the amount of chlorofluorocarbons released into the air increase?
(a) Infrared rays
(b) X - rays
(c) Gamma rays
(d) Ultravilolet rays
How much time does it take for one CFC molecule after it is released into the atmosphere, to destroy molecules of Ozone?
2 year
3 year
1 year
5 year
Describe the effects of ozone. [3 MARKS]
Which of the following statement about ozone is correct?
(a) It is essential for breathing.
(b) It absorbs ultraviolet rays.
(c) Its proportion in air is about 3 %.
(d) It is mainly responsible for global warming.
- Liver cancer
- Skin cancer
- Damage to eyes
- Reduced immune system
At the upper level of the atmosphere (stratosphere), ozone shields the surface of the earth from the __________ radiation of the Sun.
What do you meant by ozone depletion?
Why is depletion of ozone considered a serious problem?
- Chlorine, Fluorine, Carbon
- Chromium, Fluorine, Cobalt
- Calcium, Iron, Copper
- Chromium, Fluorine, Carbon
What are the harmful effects of ozone depletion?
What is an ozone hole? Where was it first located?
Depletion of the ozone layer is mainly due to ____________.
How would depletion of ozone in the stratosphere affect human life?
CFCs convert ozone to oxygen.
True
False
Ozone layer protects us from:
- infrared rays
- visible rays
- ultraviolet rays
- gamma rays
Any one disease caused due to ozone hole = _______.
Ozone layer protects us from harmful _______ rays of the sun.
Red
Ultra violet
Yellow
Purple
The pollutants released from air conditioners and refrigerators are:
cholroflurocarbons
chlorocarbons
hydrocarbons
chorinecarbons
- fans
- refrigerators
- televisions
- wooden articles
- True
- False
- Chlorofluoro carbons
- Carbon dioxide gas
- Sulphur dioxide gas
- Nitrogen gas
- True
- False