Tag: environment pollution

Questions Related to environment pollution

Lead is considered as a major  _________ pollutant.

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  1. water

  2. air

  3. soil

  4. none of above

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Correct Option: B
Explanation:

Lead is a major air pollutant.Smelters (metal refineries) and other metal industries; combustion of leaded gasoline in piston engine aircraft; waste incinerators (waste burners), and battery manufacturing.

Which of the following are causes of industrial pollution?

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  1. Asbestos

  2. Oils

  3. Nitrates & Phosphates

  4. All of above

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Correct Option: D
Explanation:

All the options are causes of industrial pollution
Asbestos:
This pollutant has cancer-causing properties. When inhaled, it can cause illnesses such as asbestosis and some types of cancer.
Nitrates & Phosphates:
These are found in fertilizers, and are often washed from the soils to nearby water bodies. They can cause eutrophication, which can be very problematic to marine environments.
Oils:
Oils form a thick layer on the water surface because they do not dissolve in water. This can stop marine plants receiving enough light for photosynthesis.

__________  is the deterioration (destruction) of the earths land surfaces, often directly or indirectly as a result of mans activities and their misuse of land resources.

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  1. Land pollution

  2. Soil erosion

  3. Deforestation

  4. Enrichment of soil

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Correct Option: A
Explanation:

Land pollution is the deterioration (destruction) of the earths land surfaces, often directly or indirectly as a result of mans activities and their misuse of land resources.
It occurs when waste is not disposed of properly, or can occur when humans throw chemicals onto the soil in the form of pesticides, insecticides and fertilizers during agricultural practices.

This process in which nutrient enriched water bodies support a dense plant population, which kills animal life by depriving it of oxygen and results in subsequent loss of biodiversity is known as ________.

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  1. green-house effect

  2. eutrophication

  3. land pollution

  4. none of above

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Correct Option: B
Explanation:

Rain can carry and deposit the nitrogen in some pollutants on rivers and soils. This will adversely affect the nutrients in the soil and water bodies. This can result in algae growth in lakes and water bodies, and make conditions for other living organism harmful.this is called eutrophication.

Acid rain is caused by _______.

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  1. emission of gases from industries

  2. air pollutants

  3. both (A) and (B)

  4. none of above

Show answer
Correct Option: C
Explanation:

Chemical reactions involving air pollutants can create acidic compounds which can cause harm to vegetation and buildings. Sometimes, when an air pollutant, such as sulfuric acid combines with the water droplets that make up clouds, the water droplets become acidic, forming acid rain.

When pollutants in the air mix up in a chemical reaction, they form an even more dangerous chemical.these pollutants are called ______.

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  1. primary air pollutant

  2. secondary air pollutant

  3. tertiary air pollutant

  4. none of above

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Correct Option: B
Explanation:

Secondary pollutants: When pollutants in the air mix up in a chemical reaction, they form an even more dangerous chemical. Photochemical smog is an example of this, and is a secondary pollutant.

Pollution is:

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  1. removal of top soil

  2. release of toxic/undesirable materials in environment

  3. conservation of energy

  4. all of the above

Show answer
Correct Option: B
Explanation:
The correct answer is the release of toxic materials in the environment.
The reasons are:-
  • Toxic waste is any unwanted material in all forms that can cause harm (e.g. by being inhaled, swallowed, or absorbed through the skin).
They pollute the air and contaminate soil and water. Disposing of such waste is a major public health issue.
They are the major contributors for the Environmental pollution when it is not disposed of and water pollution, when they are dumped in the water.

Pollution is mainly caused by:

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  1. increase in population and decrease in natural resources

  2. industrialisation

  3. urbanization and deforestation

  4. all the above

Show answer
Correct Option: D
Explanation:
  1. Population explosion ends up in over use of natural resources and hence pollutes the environment. For example higher population pollutes our water resources around us.
  2. industralisation ends up in the release of effluents into water bodies or spoiling land areas.
  3. Cutting down trees for fuel and burning end up in air pollution.
  4. Urbanisation after deforestation ends up in polluted atmosphere and deficit of fresh water for human use.

Chemical pollution is mainly due to the discharge of organic & inorganic substances released into the water.

Is the above statement correct?

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  1. True

  2. False

Show answer
Correct Option: A
Explanation:

Most of the chemicals that pollute the environment (mainly water) are man-made, resulted from various activities. Toxic chemicals used for various purpose are thrown into water. Organic and inorganic pollutants are the main causes of chemical pollution. For example, many rivers and surface water bodies were contaminated by numerous waste streams from various chemical plants.

So, statement is true.

'Thermal pollution' means dumping heat in an ecological system, like a lake or a pond. Thermal power plants have to throw some heat into a 'sink' because of they:

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  1. get overheated

  2. have special anti-pollution laws

  3. follow the local sanitation laws

  4. follow the second natural law of thermodynamics

Show answer
Correct Option: A
Explanation:

Thermal pollution is the degradation of the quality of water due to a sudden change of its temperature. A primary source of thermal pollution is the discharge of heated water from the power plants. The unused heat, generally around $60$% of the input energy which is unable to be used in the process, is then returned to a sink, such as water.