Environmental Chemistry Quiz 2

17 Questions | By GPCS | Last updated: Mar 20, 2022 | Total Attempts: 386

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Environmental chemistry is the scientific study of the chemical and biochemical phenomena that occur in natural places. This branch of science helps us to understand the effects of pollutants, how to reduce the contamination and how to manage the environment. Test your knowledge of this branch below. All the best!

Questions and Answers

1.

Fresh spring water can have problems with water quality. One reason is because water can have harmful acid in it. What it looks like is an indicator of water quality that is referred to as ….
- A.
  
  Clarity
- B.
  
  Acuity
- C.
  
  Humidity
- D.
  
  Turbidity
2.

This type of chemical indicator is used to determine the level of plant nutrients in a sample of water, indicating the presence of …
- A.
  
  Sulfur and silicon
- B.
  
  Carbon and hydrogen
- C.
  
  Nitrogen and potassium
- D.
  
  Oxygen and carbon dioxide
3.

This type of indicator is used to determine the level of plant nutrients in a sample of water.
- A.
  
  Invertebrates only
- B.
  
  Chemical indicators
- C.
  
  Biological organisms
- D.
  
  Micro-biological organisms
4.

Only certain chemicals are measured in parts per billion and parts per trillion. One of these chemicals is PCB (polychlorinated biphenyl). The reason that its level is constantly monitored in parts per trillion is because the chemical …
- A.
  
  Decompose easily
- B.
  
  Magnifies up the food chain
- C.
  
  Magnifies down the food chain
- D.
  
  Reacts with organic compounds
5.

Aquatic invertebrates are called biological indicators because they indicate water quality. The aquatic invertebrate illustrated here is a …
- A.
  
  Midge larva
- B.
  
  Stonefly larva
- C.
  
  Water boatman
- D.
  
  Mosquito larva
6.

Aquatic invertebrates are called biological indicators because they indicate water quality. The aquatic invertebrate illustrated here is a …
- A.
  
  Midge larva
- B.
  
  Stonefly nymph
- C.
  
  Water boatman
- D.
  
  Mosquito larva
7.

Aquatic invertebrates are called biological indicators because they indicate water quality. The aquatic invertebrate illustrated here is a …
- A.
  
  Midge larva
- B.
  
  Stonefly nymph
- C.
  
  Water boatman
- D.
  
  Mosquito larva
8.

The amount of dissolved oxygen in the water supports different varieties of invertebrates. Which of the organisms in the question above would you likely find in water that has a dissolved oxygen level of 2?
- A.
  
  Midge larva
- B.
  
  Stonefly nymph
- C.
  
  Water boatman
- D.
  
  Mosquito larva
9.

A freshwater biologist tested the level of dissolved oxygen in a section of the creek and found that it was quite low. The biologist was able to increase the level of dissolved oxygen by doing all of the following EXCEPT …
- A.
  
  Adding ice to the water
- B.
  
  Planting additional water plants
- C.
  
  Placing large boulders upstream
- D.
  
  Placing large boulders downstream
10.

Measuring small amounts of chemicals in water is done using the ppm method. To determine how harmful the amount is, another method is used. This method determines how much of a particular chemical will harm (kill) fifty percent of the test population. The measurement is …
- A.
  
  KP50 (Kill Population 50)
- B.
  
  HP50 (Harm Population 50)
- C.
  
  LD50 (Lethal Dose 50)
- D.
  
  LA50 (Legal Amount 50)
11.

50 represents 50% of the subject group that will die, if they are given the specified dose, …
- A.
  
  Over 50 hours
- B.
  
  In 50 doses
- C.
  
  All at once
- D.
  
  50 time
12.

Most of our chemical effects information for humans comes from …
- A.
  
  Case studies during the 1950’s
- B.
  
  Accidental-exposure case studies
- C.
  
  Experiments during the World Wars
- D.
  
  Stories that were once urban legends
13.

A correct explanation of this statement – “The LD50 of DDT is 87mg/kg, for rats, by mouth.” is …
- A.
  
  50 rats will survive if they eat 87 mg of DDT
- B.
  
  50 rats will die if they are given less than the 87mg/kg of DDT
- C.
  
  50% of the test population of rats will die if given 87 mg of DDT
- D.
  
  50% of the rat test pop. will survive if given 87mg/kg of body weight of DDT
14.

A correct explanation of this statement – “The LD50 of arsenic is 34mg/kg, for rabbits, by injection.” is …
- A.
  
  50% of the rabbit test pop. died when given 34mg/kg of body weight of arsenic
- B.
  
  34% of the test population of rabbits will die if given 50 mg of arsenic
- C.
  
  50 rabbits will die if they are given less than the 34mg/kg of arsenic
- D.
  
  34 rabbits will die if they eat 50 mg of arsenic of body weight
15.

It is now a well-known fact that mercury is a harmful heavy metal. Headbands on hats were treated in mercury before the harmful effects of mercury were known. This helps to explain the abnormal behavior of this character, from ‘Alice In Wonderland’.
- A.
  
  The Mad Hatter
- B.
  
  The Calico Cat
- C.
  
  The White Rabbit
- D.
  
  The Queen of Hearts
16.

Acid shock is an environmental event (spring snow melt and runoff into streams and rivers) that causes serious harm to these …
- A.
  
  Bacteria and fungi
- B.
  
  Very old organisms
- C.
  
  Eggs and young offspring
- D.
  
  Only mayflies and stoneflies
17.

Calcium sulfate (gypsum) is recovered when sulfur dioxide reacts with calcium carbonate. This recovery of calcium sulfate from smokestacks is possible using this technology …
- A.
  
  Oxidizer
- B.
  
  Scrubber
- C.
  
  Catalytic converter
- D.
  
  Fractional distillator