Among the following,the one which is not a "green house gas" is:
- A$N_{2}O$
- B$CO_{2}$
- C$CH_{4}$
- D$O_{2}$
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Which substance is now used in refrigerators instead of $CFC$s?
Medium
View SolutionWhich of the following statements are correct?
a) $F^{-}$ ion concentration above $2 \ ppm$ causes brown mottling of teeth
b) The maximum limit of nitrate in drinking water is $400 \ ppm$
c) Depletion of ozone layer leads to cataract and skin cancer
d) The irritant red haze in the traffic is due to oxides of sulphur
a) $F^{-}$ ion concentration above $2 \ ppm$ causes brown mottling of teeth
b) The maximum limit of nitrate in drinking water is $400 \ ppm$
c) Depletion of ozone layer leads to cataract and skin cancer
d) The irritant red haze in the traffic is due to oxides of sulphur
Which one of the following is mainly responsible for the depletion of the ozone layer?
Pollution is a change in physical,chemical or biological characters of our land and water that may be
The ozone layer exists up to $20 \ km$ above the Earth. Which of the following statements is true regarding the ozone layer and ozone?
Easy
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