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Environmental Chemistry Quiz 27

Environmental Chemistry Quiz 27

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!

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Quiz Questions And Answers

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 referr

Clarity
Acuity
Humidity
Turbidity

This type of chemical indicator is used to determine the level of plant nutrients in a sample of water, indicating the presence of ...

Sulfur and silicon
Carbon and hydrogen
Nitrogen and potassium
Oxygen and carbon dioxide

This type of indicator is used to determine the level of plant nutrients in a sample of water.

Invertebrates only
Chemical indicators
Biological organisms
Micro-biological organisms

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 m

Decompose easily
Magnifies up the food chain
Magnifies down the food chain
Reacts with organic compounds

Aquatic invertebrates are called biological indicators because they indicate water quality. The aquatic invertebrate illustrated here is a ...

Stonefly larva
Water boatman
Mosquito larva

Aquatic invertebrates are called biological indicators because they indicate water quality. The aquatic invertebrate illustrated here is a ...

Midge larva
Stonefly nymph
Water boatman
Mosquito larva

Aquatic invertebrates are called biological indicators because they indicate water quality. The aquatic invertebrate illustrated here is a ...

Midge larva
Stonefly nymph
Water boatman
Mosquito larva

50 represents 50% of the subject group that will die, if they are given the specified dose, ...

Over 50 hours
In 50 doses
All at once
50 time

Most of our chemical effects information for humans comes from ...

Case studies during the 1950's
Accidental-exposure case studies
Experiments during the World Wars
Stories that were once urban legends

A correct explanation of this statement - "The LD50 of DDT is 87mg/kg, for rats, by mouth." is ...

X50 rats will survive if they eat 87 mg of DDT
50 rats will die if they are given less than the 87mg/kg of DDT
50% of the test population of rats will die if given 87 mg of DDT
50% of the rat test pop. will survive if given 87mg/kg of body weight of DDT
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