QUESTION 4 What elements are responsible for Ozone depletion in the Chlorofluoro

Question

QUESTION 4 What elements are responsible for Ozone depletion in the Chlorofluorocarbon family of greenhouse gases? Chlorine and Carbon O Chlorine and Hydrogen O Chlorine and Bromine Bromine and Hydrogen Bromine and Carbon O Carbon and Hydrogen QUESTION 5 Which 'Protocol is responsible for the phasing out of CFC's? O Kyoto Protocol Montreal Protocol Geneva Protocol O Vienna Protocol O None of the above QUESTION 6 Ground-level ozone is on the rise and is one of the constituents of smog and air pollution. True or false, the rise in ground-level ozone is beneficial to the ozone layer in the stratosphere? O True O False QUESTION 7 Scientists are able to accurately determine the atmospheric composition from thousands to hundreds of thousands of years ago by what means? O By use of carbon dating O By extrapolating the data based on the current values measured in the atmosphere, and trending these data back in time O With the use of mass spectrometry on fossils. O By studying ice cores taken from around the world. None of the above

Explanation / Answer

4.The answer is C- chlorine and bromine

Chlorine and bromine both have similar atomic structure and they are capable of depleting the ozone layer. When a single atom of either chlorine or bromine comes in contact with an ozone molecule, they form hypochlorite or hypobromite ion and leaves molecular oxygen.

5.The answer is B-montreal protocol

This is an international treaty for the protection of ozone layer by phasing out the various substances which are responsible for the ozone layer depleting.

6.The answer is false

Ground level ozone is produced by the activities of the humans and it has various health affects on humans and it has got no use in stratosphere.

7.the answer is d-by studying ice cores taken around the world

This is by scientific examination of samples taken at thousands of feet deep.

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