Question

All are primary pollutants except

• A. \(SO_2\)
• B. \(H_2SO_4\)
• C. \(NO_2\)
• D. particulate matter

Hint:

Secondary pollutants are those that are created in the atmosphere as a result of interactions between main pollutants but are not directly released from a particular source.

Answer 1

The Correct Option is B

The correct answer is Option B) \(H_2SO_4\)

A secondary pollutant called H₂SO₄ is created when the main pollutant SO₂ reacts with oxygen and water.

Discover More Topics From This Chapter: Environmental Pollution

Answer 2

The correct answer is Option is B) \(H_2SO_4\)

Real Life Applications

• Nitrogen oxides are a type of petrol (NOx). In urban areas, burning fossil fuels (such as petrol and diesel engines) is the main source of nitrogen oxides, whereas in rural areas, microorganism activity in compost and farming practices, such as the use of synthetic fertilizers, are the main sources. Nitric oxide exposure may cause the respiratory system to become inflamed.
• A naturally occurring gas called carbon monoxide (CO) is created when fuel is burnt inefficiently and is an odorless, colorless gas. The main contributors to atmospheric carbon monoxide are biomass burning and petrol or diesel-powered vehicles. High levels of the very hazardous gas carbon monoxide have been linked to an increased risk of cardiovascular disease. Extreme CO exposure has the potential to render a person comatose or even fatal.
• Sulphur (SOx) is a gas that is concealed and has a strong odor. Sulfur oxides are compounds that contain SOx. The bulk of sulfur dioxide's origins come from the processing of sulfur-bearing mineral ores and the combustion of fossil fuels, both of which are human sources of the gas. Sulfur dioxide exposure severely impairs the respiratory system in both people and animals. Sulfur dioxide and water can mix in the presence of water in the atmosphere to create dangerous acid rain.

Question can also be asked as

1. Which of the following is NOT a primary pollutant?
2. Identify the pollutant that is NOT a primary pollutant.
3. Which of the options is a secondary pollutant?
4. Which of the following is a secondary pollutant formed from the reaction of primary pollutants?

Answer 3

The correct answer is Option B) \(H_2SO_4\)

Environmental pollution results from an undesired alteration in the environment that has negative consequences on plants and animals. 

• Environment refers to the area around us, whereas pollution is the presence of something that might be dangerous or have negative effects.
• A pollutant is any material that contributes to pollution.
• Pollutants can take the shape of a solid, liquid, or gas.
• When a substance's concentration increases owing to a natural occurrence or human activity, it becomes a pollutant.
• Many natural mechanisms can quickly break down the contaminants.
• Additionally, certain contaminants, like DDT and plastic materials, take decades to break down.

Primary Pollutants

Primary pollutants are those that reach the atmosphere directly from their sources.

• It can be managed by limiting pollution-causing human activities.
• They have an impact on the environment and living things directly and indirectly by contributing to the production of secondary pollutants.
• For Example - Hydrocarbons, Sulphur dioxide, Nitrogen oxide, and Carbon monoxide.

Secondary Pollutants

Secondary pollutants are those that are created when main air pollutants interact with other elements of the atmosphere. Physical or chemical interactions may take place here.

• These are challenging to manage, due to their complicated chemical reactions.
• When photochemical agents play a role in their development, they become extremely reactive.
• For Example - Acid rain, Sulfuric acid, Photochemical smog.

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