Aquatic Chemistry/Contaminant Quiz #3

1. Aquatic Chemistry/Contaminant Quiz #3 Grade: «11th & 12th» «Aquatic Science» Subject: «10/11/2012» Date:

2. 1 HCO3- is A carbonate B bicarbonate C carbonic acid D carbon dioxide

3. 2 As carbonic acid eventually becomes carbonate, which molecules are released A hydronium B hydroxide C carbonate D salt

4. 3 Which of the following reactions is responsible for fixing nitrogen: A NH4+ --> NO2- B NO2- --> NO3- C NO3- --> N2 D N2 --> NH4+

5. 4 Which of the following is NOT true about oxygen depleting contaminants: A If oxygen is depleted in natural water sources, most aquatic life will die B Organic compounds are a required reactant C If oxygen is depleted in natural water, there will be a spike in the concentration of CO2 D Oxygen depleting wastes have more bacteria as products than as reactants

6. 5 What is the required ratio of carbon to nitrogen to phosphorus that is ideal for bacterial growth: A 1:10:100 B 100:10:1 C 100:1:10 D 10:1:100

7. 6 Which of the following is a consequence of algal blooms A a release of cyanotoxins B the consumption of cyanotoxins C the release of UV light D an increase in Phosphorus in fresh water lakes

8. 7 Salt contaminants (TDS) is a problem for agricultural areas because: A TDS is recommended to be less than 500 ppm B Methane produces a high amount of salt in water sources C Salt is resonsible for the taste and smell of "corked" wine D Salt reduces the permeability of soil

9. 8 Which of the following is FALSE about thermal pollution: A An increase of temperature causes a decrease in DO B An increase in temperature yields an increase in secondary consumers C An increase in temperature causes an increase in bacterial growth D Thermal pollution is often a result of using water sources to cool water/equipment associated with power plants

10. 9 Which of the following steps of the Nitrogen cycle is anaerobic: A Ammonia turning into Nitrite B Nitrite turning into Ammonia C Nitrate turning into Nitrogen gas D Nitrite turning into Nitrate

11. 10 Methemoglobinemia is defined by... A nitrites binding with hemoglobin and preventing oxygen from binding to red blood cells B nitrates binding to hemoglobin and doubling the rate at which oxygen binds to red blood cells C an increase in rates of bladder cancer in older women D a misregulation of the endocrine system

12. 11 DBPs are the direct result of A human waste being dumped into the water B nitrate runoff from agricultural fertilizer C byproduct formation from disinfectants D oxidation of nitrites in sewage lines

13. 12 CO32- is A carbonate B bicarbonate C carbonic acid D carbon dioxide

14. 13 Approximately _______% of the planet's water is fresh water. A 2.5 B 10 C 25 D 46

15. 14 H2CO3 is A carbonate B bicarbonate C carbonic acid D carbon dioxide

16. 15 All of the following are true about chlorine & chlorime byproducts EXCEPT A it can destroy bacteria, viruses, and difficult to kill parasites such as Giardia B there is evidence that the byproducts of chlorine can cause birth defects C it can cause large/accelerated gestational age/growth D it can cause neural tube defects