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Question

Which of the following is not a primary pollutant?

This question was previously asked in
HTET 2025 Level 1 PRT Question Paper (5-Jul-2026)
The correct answer is

Ground level ozone

Ground level ozone is a secondary pollutant because it is not emitted directly into the air but forms when other pollutants, such as nitrogen oxides and volatile organic compounds, react in sunlight. Volatile organic compounds, nitrogen oxides and carbon monoxide, by contrast, are emitted directly from sources like vehicles and industries, making them primary pollutants.

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Similar Questions

  1. _____ is the over enrichment of water by nutrients such as nitrogen and phosphorus.

  2. The components of air which are harmful to living beings are:

  3. Which one of the following statement is NOT correct regarding ozone?


Important Questions from Pollution

  1. Which of these can be a cause for soil erosion?

  2. Which of the following is NOT a biodegradable waste?

  3. “Green Muffler” is related to:

  4. Match the following Pollutants and their Mediums as per the UNEP documents :

    Pollutant

    Medium

    a. Nitrogen oxides

    I. Sea

    b. Petroleum hydrocarbons

    II. Food

    c. Fluorides

    III. Air

    d. Mycotoxins

    IV. Freshwater

  5. Which of the following options means that the fog which has been polluted by smoke?

    A. Skog

    B. Pollutant

    C. Clog

    D. Smog

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