NEET Solved Paper 2018 Question 23
Question: Which of the following is a secondary pollutant? [NEET - 2018]
Options:
A) $ S{O_2} $
B) $ C{O_2} $
C) $ CO $
D) $ {O_3} $
Show Answer
Answer:
Correct Answer: D
Solution:
- Let’s analyze the options:
A) ( SO_2 ) (Sulfur dioxide) - This is a primary pollutant, directly emitted from sources like volcanic eruptions and industrial processes.
B) ( CO_2 ) (Carbon dioxide) - This is also a primary pollutant, directly emitted from sources like respiration, combustion of fossil fuels, and deforestation.
C) ( CO ) (Carbon monoxide) - This is a primary pollutant, directly emitted from sources like vehicle exhaust and industrial processes.
D) ( O_3 ) (Ozone) - This is a secondary pollutant. It forms in the atmosphere through photochemical reactions involving primary pollutants like nitrogen oxides (NOx) and volatile organic compounds (VOCs) in the presence of sunlight.
BETA
