10/02/2016
S30 Unit B: Chem – Organic
Chemistry Practice Quiz
Name: ____________
Date: ____________
MC and NR: place answers on the answer sheet provided.
1. An environmentalist expected the water of a particular river to be high in organic content.
High organic content in a river would result in
a) low BOD and low levels of algae
b) high BOD and low levels of algae
c) low BOD and high levels of algae
d) high BOD and high levels of algae
2. The functional groups present in the structural formula above are
a) an alcohol and an ester
b) a carboxylic acid and an ester
c) a halogenated hydrocarbon and an alcohol
d) a carboxylic acid and a halogenated hydrocarbon
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3. Dioxins are polychlorinated hydrocarbons. Which of the following molecules represents a
dioxin?
Use the following information to answer the next question.
4. An organic functional group present in 2,4-D is the
a) ester group
b) ketone group
c) aldehyde group
d) carboxylic acid group
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5. A butyl ester is found in another pesticide. The formula for this compound is
6. Industrial pollutants can accumulate in marine ecosystems. Which of the following organisms
would have the highest concentration of pollutants?
a) sharks
b) shrimp
c) microscopic organisms
d) algae
7. To limit its negative environmental effects, a pesticide should be
a) volatile, vaporizing into the air
b) general, attacking many species
c) specific, attacking only one species
d) stable, remaining effective for long periods of time
8. The substance shown above is used as a disinfectant. Its chemical name is
a) propene
b) prop-2-ene
c) propanol
d) propan-2-ol
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9. Various fractions of natural gas, such as ethene (C2H4(g)), are produced in the petrochemical industry.
To produce the solvent used in dry cleaning, chlorine and fluorine are substituted for the hydrogens,
which produce dichlorodifluoroethene.
This compound poses the greatest environmental danger as
a) a greenhouse gas
b) an ozone-depleting compound
c) an oxygen block decreasing the BOD
d) a component of photochemical smog
10. A lake has a high BOD. As a result the dissolved oxygen is __i__ and the number of
invertebrates is __ii__
The row with the words corresponding to blanks i and ii is
a)
b)
c)
d)
i
high
low
high
low
ii
high
low
low
high
Use the following information to answer the next question.
When fertilizers leach into a pond algae begins to form on the surface. As the number of
algae increase, the demand for oxygen increases and there is less dissolved oxygen for
aquatic life. As the algae die, they form a layer of decaying matter on the bottom of the pond,
eventually causing it to dry up.
11. This process is called
a) BOD
b) algae blooms
c) eutrophication
d) buffering
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12. Fish-eating birds in a test area were found to have a higher concentration of dioxins than the
fish they eat. This is a result of
a) biodiversity
b) biofeedback
c) bioselectivity
d) biomagnification
13. Farmers in an area want to try a new pesticide that contains a chemical called ivermectin.
This compound is similar to DDT in that it is a very stable compound and does not dissolve
easily in water. Those who oppose the use of ivermectin are concerned that ivermectin will
a) be target specific
b) be excreted by target organisms
c) biodegrade too quickly to be effective
d) accumulate in increasing concentration in the food chain
Use the following information to answer the next question
Test Results of Four Soil Samples Analyzed by an
Environmental Testing Laboratory
Sample
1
2
3
4
Acceptable Levels
NR 1
Pesticides
(mg/kg)
0.05
0.03
0.01
20.00
0.10
Lead
(mg/kg)
600
10
30
40
50
PCBs
(mg/kg)
0.02
9.00
0.01
0.04
0.10
Gasoline
(mg/kg)
20
70
800
10
100
Match each of the samples numbered above with the site of its probable pollution
source, as listed above. Use each number only once.
Petroleum refinery
Farmland
Battery disposal site
Electrical equipment disposal site
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____
____
____
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Use the following information to answer the next question
A technician tests the environment for different organic
compounds.
Structural formulas of four organic compounds
NR 2
1
2
3
4
Match the number of each organic compound above to the functional group below.
______ carboxylic acid
______ alcohol
______ ester
Use the following information to answer the next question.
Analysis of Water From a Lake Adjacent to a Power Plant
Water Quality Parameter
pH
BOD
Lead (Pb)
Temperature at bottom of lake
Reading
5.00
25 µg/mL
100 µg/mL
10°C
14. The water quality parameter that indicates the presence of a significant amount of living
matter is the
a) low pH
b) high BOD
c) high temperature
d) high concentration of heavy metals
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Written Response: show all work to receive full marks.
Our atmosphere is a mixture of colourless gases. It stretches for many kilometers above Earth.
It is constantly undergoing changes as a result of discharges or pollutants from a number of sources.
The practices of industry, agriculture, and the average citizen all contribute to these changes.
A.
The cartoon presents a humorous look at one of the environmental problems of air pollution.
Describe the cartoonist’s main point.
B.
Name any three air pollutants. Indicate the sources of each pollutant using chemical
reactions and formulas where appropriate. Describe the effect of each pollutant on the
atmosphere, land, or water. Outline a strategy or technology that has been created to reduce
or eliminate the negative effects of each pollutant.
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