ENVIRONMENTAL CHEMISTRY

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

• a) Earth chemistry

• b) Global warming chemistry

• c) Atmospheric chemistry

• d) Acid rain chemistry

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

• 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 altitudes

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