The GATE Grind

GATE 2024 CE (CE1) – Question 31

Air Pollution and Municipal Solid Wastes · Air pollution: pollutants, sources, impacts, control and air quality index · 1 mark · Multiple select

The primary air pollutant(s) is/are

  1. Sulphur dioxide
  2. Lead
  3. Ozone
  4. Sulphuric acid

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Show answer and explanation

Correct answer: (A) Sulphur dioxide; (B) Lead

Explanation

Primary pollutants are emitted directly from sources: sulphur dioxide (from burning fuel) and lead. Ozone and sulphuric acid are secondary pollutants, formed in the air by reactions of other pollutants.