ENVIRONMENTAL CHEMISTRY

1. Which of the following disciplines studies the chemistry of the earth’s atmosphere?    

• a)      Earth chemistry     

• b)      Global warming chemistry    

  chemistry

• c)      Atmospheric chemistry   

• d)     Acid rain

2.  An environmental problem which atmospheric chemistry does not addressed is        

• a)      acid mine water        

• b)      photochemical smog          

• c)      acid rain                    

• d)     global warming

3.  Which of the following is not affected by air pollution?         

• a)     Aquatic animals        

• b)     Ecosystem        

• c)     Crops                        

• d)     None

4.  The largest gaseous component of the atmosphere is        

• a)      oxygen      

• b)      carbondioxide        

• c)      nitrogen      

• d)     watervapour

5.  Ozone is

• a)      desirable in the troposphere

• b)      an undesirable pollutant in the stratosphere

• c)      filters harmful UV-radiation in the stratosphere

• d)     none

6.  Harmful UV-radiation is blocked by ozone layer in the         

• a)      mesosphere    

• b)      troposphere   

• c)      stratosphere   

• d)     thermosphere

7.  The reaction, H₂O + hv  →  HO^• + H, represents        

• a)      the formation of hydroxyl radical at higher altitudes          

• b)      formation of the hydroxyl radical in the relatively unpolluted troposphere.        

• c)      the strong reactivity of the hydroxyl radical.        

• d)     destruction of the hydroxyl radical at higher altitude

8.  The atmosphere is slightly acidic because of

• a)      the presence of a low level of carbon dioxide

• b)      the existence of high amount of nitrogen

• c)      the formation of hydrochloric acid by the dissolution of chlorine gas in water

• d)     the presence of low level of ammonia.

9.  The most important basic species in the atmosphere is

• a)      gas phase carbon monoxide

• b)      gas-phase ammonia, NH₃.

• c)      Calcium carbonate

• d)     Calcium oxide.

10.  Air pollutants which are emitted directly into the atmosphere from an identifiable source are said to be          

• a)      primary pollutants             

• b)      VOCs            

• c)      Aerosols                            

• d)     all