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Previous year question hub

Gaseous Pollutants - Air and Noise Pollution - Environmental Science & Engineering Previous Year Questions

Practice Gaseous Pollutants - Air and Noise Pollution - Environmental Science & Engineering previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

2Papers
2Years
3Questions
1Topics

Gaseous Pollutants question pattern

Every graph below is calculated only from this selection.

Questions by year

Compare question counts across years.

Difficulty distribution

How the classified questions are distributed by difficulty.

Medium 2 66.7%
Easy 1 33.3%

Question type distribution

MCQ, numerical, multiple-select and other formats found in these papers.

MCQ 1 33.3%
Numerical Answer Type (NAT) 1 33.3%
MSQ 1 33.3%

Subject weightage

Top subjects by unique question coverage.

Environmental Science & Engineering
3 Qs

Most asked topics

Top topics across the included previous year papers.

Air and Noise Pollution
3 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Gaseous Pollutants
3 Qs

Paper coverage

Question coverage for the most populated papers. Every active PYP paper remains listed below.

Environmental Science & Engineering (ES) 2026
1 Qs
Environmental Science & Engineering (ES) 2022
2 Qs

Included previous year papers

Newest papers appear first. Search these papers or sort by year and name.

Paper nameYearPDFAttempt
Environmental Science & Engineering (ES) 20262026
1 questions in this view		2026
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Environmental Science & Engineering (ES) 20222022
2 questions in this view		2022
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download

All Gaseous Pollutants previous year questions

Practice every matching question in batches of 20, with every available option.

1
2022 · Environmental Science & Engineering · Air and Noise Pollution · Gaseous Pollutants
Environmental Science & Engineering (ES) 2022
Which one of the following is most commonly used raw material in flue gas desulfurization units?
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2
2022 · Environmental Science & Engineering · Air and Noise Pollution · Gaseous Pollutants
Environmental Science & Engineering (ES) 2022
A ground level source emits 1000 g per day of SO₂. In vicinity of the source, ambient temperature is measured at 10 m and 110 m as 25°C and 24.5°C, respectively. The mean wind speed is found to be 2 m per second. The dispersion coefficients at 1000 m downwind distance from the source are given in table below:
Dispersion coefficients (in m)
StableNeutralUnstable
Crosswind direction50.580.0156.0
Vertical direction21.441.5110.2
Estimated ground level concentration (in µg/m³, rounded off to two decimal places) of SO₂ at a downwind distance of 1000 m (at the plume centerline) from the source is __________.

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3
2026 · Environmental Science & Engineering · Air and Noise Pollution · Gaseous Pollutants
Environmental Science & Engineering (ES) 2026
Which of the following chemical reactions is/are related to smog formation in the troposphere?
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