Question
Download Solution PDFWhich of the following is called secondary air pollutant?
This question was previously asked in
Bihar STET TGT (Sanskrit) Official Paper-I (Held On 11 Sept, 2023 Shift 1)
Answer (Detailed Solution Below)
Option 4 : Both 1 and 2
Free Tests
View all Free tests >
Bihar STET Paper 1 Mathematics Full Test 1
13.9 K Users
150 Questions
150 Marks
150 Mins
Detailed Solution
Download Solution PDFThe correct answer is Both 1 and 2.
Key Points
- Primary vs. Secondary Air Pollutants
- Primary Air Pollutants are emitted directly from a source.
- Examples:- Carbon Monoxide (CO), Sulfur dioxide (SO2), and Nitrogen oxides (NOx).
- Secondary Air Pollutants are not emitted directly but form in the atmosphere when primary pollutants react or interact.
- Examples:- Ozone (O3), peroxyacetyl nitrate (PAN), and certain particulates.
Additional InformationSecondary Air Pollutants:
- Peroxyacetyl Nitrate (PAN):
- PAN is a component of photochemical smog.
- It forms in the atmosphere through the reaction of volatile organic compounds (VOCs) and nitrogen oxides (NOx) in the presence of sunlight.
- Ozone (O3):
- Ozone at ground level (tropospheric ozone) is a major component of smog.
- It forms when nitrogen oxides (NOx) react with VOCs in the presence of sunlight.
Last updated on Jan 29, 2025
-> The Bihar STET 2025 Notification will be released soon.
-> The written exam will consist of Paper-I and Paper-II of 150 marks each.
-> The candidates should go through the Bihar STET selection process to have an idea of the selection procedure in detail.
-> For revision and practice for the exam, solve Bihar STET Previous Year Papers.