1) Which of the following is true about carbon monoxide? a. it is poisonous b. it is insoluble in water c. it is not an air pollutant d. it cannot cause death
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2) Which of the following is not true about sulfur dioxide? a. it is colorless b. it is odourless c. it is an air pollutant d. it causes breathing difficulties
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3) Which of the following is not true about nitrogen dioxide? a. it is reddish brown b. it has pungent odor c. it is insoluble in water d. it is toxic
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4) An allotropic form of oxygen comprising three oxygen atoms is called a. ozone b. oxidation c. oxidizing agent d. reducing agent
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5) Which of the following is true about incineration? a. it consumes all combustible materials b. it is a clean process c. it does not produce air pollution d. it does not generate odor
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6) Formation of most of the clouds is in a. troposphere b. stratosphere c. mesosphere d. thermosphere
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7) Height of stratosphere is a. 0-12 Km b. 12-50 Km c. 50-80 Km d. above 80 Km
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8) Which of the following is the second layer of atmosphere as one moves upwards from the Earth's surface? a. troposphere b. stratosphere c. mesosphere d. thermosphere
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9) What is meant by the term 'tropo'? a. top b. first c. high d. turning
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10) Ozone formation and destruction are powered by a. oxygen gas b. atomic oxygen c. ultraviolet radiation d. chlorine gas
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