UPSC solved previous year questions

UPSC Air pollution PYQ with Answers

9 solved Air pollution questions from previous UPSC papers, each with an answer and explanation.

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Questions
9
Years covered
2019–2025
Exam years
6
With answers
9

Air pollution questions by year

20251 20241 2022 🔒2 2021 🔒2 2020 🔒2 2019 🔒1

UPSC Air pollution PYQ with Answers

1–2 of 2
  1. Q1 2025 Prelims GS

    Artificial way of causing rainfall to reduce air pollution makes use of

    1. silver iodide and potassium iodide✓
    2. silver nitrate and potassium iodide
    3. silver iodide and potassium nitrate
    4. silver nitrate and potassium chloride
    Answer explanation

    silver iodide and potassium iodide Artificial rainfall (cloud seeding) commonly uses substances such as silver iodide and potassium iodide as cloud condensation/ice nuclei, which promote the formation of raindrops or ice crystals in…

    Air pollutionCloud seedingScience and technology
    Read full explanation
  2. Q2 2024 Prelims GS

    According to the Environmental Protection Agency (EPA), which one of the following is the largest source of sulphur dioxide emissions?

    1. Locomotives using fossil fuels
    2. Ships using fossil fuels
    3. Extraction of metals from ores
    4. Power plants using fossil fuels✓
    Answer explanation

    Power plants using fossil fuels According to the EPA's commonly cited emissions information, fossil-fuel-fired power plants—particularly those burning coal—are a major and the largest listed source of sulphur dioxide emissions.…

    Air pollutionEnvironment and ecologyMajor emission sources
    Read full explanation

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