Question

The term “water pollution” can be defined in several ways. Which of the following statements does not give the correct definition?

• A. The addition of undesirable substances to water bodies
• B. The removal of desirable substances from water bodies
• C. A change in pressure of the water bodies
• D. A change in temperature of the water bodies

Answer 1

The correct option is C

A change in pressure of the water bodies

The correct answer is option C.

Explanation of the correct option:

1. The undesirable change in the physical, chemical, and biological properties of water is due to the addition of pollutants that cause harm to the environment and living organisms.
2. Changes in the atmospheric pressure of water bodies do not cause water pollution.

Explanation for the incorrect options:

Option A:

1. The addition of undesirable substances like pesticides and fertilizers which are used in farming or the addition of poisonous substances, such as mercury and lead leads to the growth of disease-causing microorganisms, such as Vibrio cholera which causes cholera disease in humans.
2. The addition of undesirable substances to water makes it polluted.

Option B:

1. The removal of desirable substances from the water bodies causes water pollution.
2. For example, The addition of domestic sewage waste into the water bodies makes the water nutrient-rich which supports the growth of plants and Algae but they also utilize dissolved oxygen from the water so the amount of dissolved oxygen decreases, thus leading to a decline in aquatic organisms.

Option D:

1. The change in the temperature of water bodies leads to water pollution, which affects the life of aquatic animals as they survive at a certain temperature.
2. A sudden temperature change may have a dangerous effect on aquatic animals.

Final answer: the change in pressure of water bodies is the incorrect statement.