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Class 9 Chemistry · Chapter 10 · Test 10

Environmental Chemistry Review

25 MCQs covering the complete chapter including atmospheric composition air pollutants acid rain global warming greenhouse effect environmental strategies renewable energy and air quality index.

MCQs

25 questions · 20 min · 25 marks

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Sample questions

The first 5 of 25. Try each one, then tap to see the answer.

  1. Question 1

    Which gas makes up about 78% of the atmosphere

    • ANitrogen
    • BOxygen
    • CCarbon dioxide
    • DNoble gases
    Show answer

    Answer: A

    Nitrogen makes up about 78% of the atmosphere.

  2. Question 2

    Which gas makes up about 21% of the atmosphere

    • AOxygen
    • BNitrogen
    • CCarbon dioxide
    • DMethane
    Show answer

    Answer: A

    Oxygen makes up about 21% of the atmosphere.

  3. Question 3

    Which of the following is one of the seven major harmful air pollutants

    • ACarbon monoxide
    • BHydrogen
    • CHelium
    • DWater vapour
    Show answer

    Answer: A

    Carbon monoxide is one of the seven major harmful air pollutants listed in the chapter.

  4. Question 4

    What does one ppm mean

    • AOne part of pollutant per million parts of the mixture
    • BOne million parts of pollutant per one part of mixture
    • COne part of oxygen per hundred parts of air
    • DOne part of pollutant per thousand parts of air
    Show answer

    Answer: A

    One ppm means one part of pollutant per million parts of the solid liquid or gas mixture.

  5. Question 5

    Which gas is extremely poisonous and can stop red blood cells from carrying oxygen

    • ACarbon monoxide
    • BCarbon dioxide
    • COxygen
    • DNitrogen
    Show answer

    Answer: A

    Carbon monoxide is extremely poisonous and prevents red blood cells from carrying oxygen.

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