Practice
ENVIRONMENTAL POLLUTION
questions for UPSC, UPPCS and State PCS
examinations through focused General Studies
MCQ practice.
70
MCQs Available
7
Question Sets
ENVIRONMENTAL POLLUTION
MCQs for UPSC & UPPCS
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ENVIRONMENTAL POLLUTION
as part of
Environment
for UPSC Civil Services, UPPCS and other
State PCS examinations. Topic-wise MCQ practice
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ENVIRONMENTAL POLLUTION
questions so aspirants can practise a specific
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There are currently
70
MCQs across
7
question sets for this topic.
Sample ENVIRONMENTAL POLLUTION Questions
A preview of ENVIRONMENTAL POLLUTION MCQs with answers and explanations.
Q1. Which one of the following is a primary air pollutant?
Ozone
Sulphur dioxide
Peroxyacetyl nitrate
Photochemical smog
Correct Answer:
Sulphur dioxide
A primary air pollutant is emitted directly from a source. Sulphur dioxide is directly released mainly through the burning of fossil fuels containing sulphur.
Q2. Which one of the following particulate pollutants is generally more harmful to human health because it can penetrate deep into the respiratory system?
PM10
PM2.5
Total suspended particles
Coarse dust particles
Correct Answer:
PM2.5
PM2.5 consists of particles with a diameter of 2.5 micrometres or less. Their small size allows them to penetrate deep into the lungs and potentially enter the bloodstream.
Q3. Which one of the following gases is a major precursor of photochemical smog?
Nitrogen oxides
Carbon dioxide
Methane
Sulphur hexafluoride
Correct Answer:
Nitrogen oxides
Nitrogen oxides react with volatile organic compounds in the presence of sunlight to produce secondary pollutants such as ground-level ozone and peroxyacetyl nitrate, which are major components of photochemical smog.
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