GATE CE 2026 Set 2 — Question 27
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Environmental Engineering → Air Pollution → Air Pollution Control
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Question
Column I presents common air pollutants, and column II presents treatment technologies commonly employed to control air pollutants.
The option that CORRECTLY matches the air pollutant with its treatment technology is:
| Air pollutant | Treatment technology |
|---|---|
| 1 Dust (size 5-25 m) | P Cyclone separator |
| 2 Carbon monoxide (CO) | Q Wet lime-water scrubber |
| 3 Sulfur dioxide () | R Electrostatic precipitator |
| 4 Fly ash (size m) | S Catalytic converter |
Correct answer
(A) 1 - P; 2 - S; 3 - Q; 4 - R
Solution
The correct matching of air pollutants to their treatment technologies is:
1.Dust (size 5-25 m): P (Cyclone separator) is effective for removing relatively coarse particulate matter (typically m).
2.Carbon monoxide (CO): S (Catalytic converter) is used in vehicles to oxidize CO to .
3.Sulfur dioxide (): Q (Wet lime-water scrubber) is a common flue-gas desulfurization (FGD) method where reacts with lime to form calcium sulfite/sulfate.
4.Fly ash (size m): R (Electrostatic precipitator) is highly efficient at capturing very fine particulate matter, including sub-micron particles.
Thus, the correct sequence is 1-P, 2-S, 3-Q, 4-R, which corresponds to option (A).Continue learning with Success Tracker
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