Free Atmospheric Pollution MCQs with Answers
36 Atmospheric Pollution MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Atmospheric pollution covers harmful gases and particles released by vehicles, industries, burning fuels and natural sources. It includes carbon monoxide, sulfur and nitrogen oxides, particulate matter, smog, acid rain, the greenhouse effect and ozone depletion, along with their causes, chemical reactions, environmental effects and control methods.
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36 questions · page 2 of 2
- A. Methane
- B. CO2
- C. Nitrous oxide
- D. Sulphur dioxide
Explanation: The greenhouse effect is how heat is trapped close to Earth's surface by "greenhouse gases." Greenhouse gases include CO2, methane, and…
Correct answer: Sulphur dioxide- A. Acid rain
- B. Green house effect
- C. Global warming
- D. Ozone depletion
Explanation: Acid rain: SO2 is a major contributor to the formation of acid rain. When released into the atmosphere, it reacts with water and other…
Correct answer: Acid rain- A. Air pollution
- B. Water pollution
- C. Acid rain
- D. Ozone layer depletion
Explanation: Chlorofluorocarbons (CFCs) are mainly responsible for ozone layer depletion.
Correct answer: Ozone layer depletion- A. burning of coal
- B. burning of charcoal
- C. automobile engines
- D. refrigeration and air conditioning
Explanation: Chloroflorocarbons are nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine.
Correct answer: burning of coal- A. CO2
- B. CO
- C. Low hydrocarbons
- D. All of them
Explanation: CO2 is the major vehicular emission responsible for causing the greenhouse effect and environmental pollution.
Correct answer: CO2- A. CO2
- B. CO
- C. Lead
- D. Free radica ethyne (C2H2)
Explanation: TEL can cause chronic lead poisoning, and hence its hazardous product is lead.
Correct answer: Lead- A. CO2
- B. SO2
- C. CH4
- D. NO2
Explanation: When paper biodegrades, especially in the presence of oxygen, the primary gas emitted is carbon dioxide (CO2), due to the aerobic…
Correct answer: CO2- A. CO2
- B. SO2
- C. CO
- D. NO2
Explanation: Acid rain is primarily caused by the dissolution of specific oxides in atmospheric moisture, leading to acidic compounds.
Correct answer: CO- A. Troposphere
- B. Stratosphere
- C. Mesosphere
- D. Thermosphere
Explanation: The top of the mesosphere, called the mesopause is the coldest part of the earth's atmosphere averaging about minus 130 degrees F.
Correct answer: Mesosphere- A. Greater than 6
- B. Greater than 6.5
- C. Less than 5.6
- D. Less than 5
Explanation: Normal clean rain has a pH value between 5.0 - 5.5, which is slightly acidic, however when rain combines with nitrogen oxides or SO2, it…
Correct answer: Less than 531. Ozone gas is:
- A. Greenish, tasteless and light
- B. Greenish blue, bitter in taste
- C. Blue. Poisonous and explosive
- D. Purple yellow, non poisonous, non explosive
Explanation: Ozone gas is pale blue,it is a toxic substance and can lead to explosive destruction when concentrated and a trigger is applied, therefore…
Correct answer: Blue. Poisonous and explosive- A. Fertilizers
- B. Biological decay of organic matter
- C. Fossil fuel combustion
- D. All of these
Explanation: Fossil fuel combustion is the major source of NO, NO2, and N2O in the atmosphere.
Correct answer: Fossil fuel combustion- A. Very unstable molecule having a half-life of 1⁄2 to 1 year
- B. Unstable molecule having a half-life of 2 to 5 years
- C. Stable molecule having a half-life of 5 to 8 years
- D. Very stable molecule having a half-life of 10 to 15 years
Explanation: The correct answer is Option D: 'Very stable molecule having a half-life of 10 to 15 years.' DDT (Dichlorodiphenyltrichloroethane) is a…
Correct answer: Very stable molecule having a half-life of 10 to 15 years- A. Reduces emission of unburnt HC's
- B. Reduces pollutants
- C. Oxidize pollutant like CO
- D. All of the above
Explanation: The correct statement is ALL OF THE ABOVE. A three-way catalytic converter is a device that is used to reduce emissions from internal…
Correct answer: All of the above- A. Coal tar
- B. Petroleum
- C. Coal
- D. Natural gas
Explanation: It is a black, combustible rock primarily composed of carbon. It is used as a fuel source for power generation and in industrial processes.
Correct answer: Petroleum- A. Chlorofluorocarbons
- B. SO2
- C. Smog
- D. Photochemical oxidation
Explanation: The ozone layer in the upper atmosphere is being primarily destroyed by chlorofluorocarbons (CFCs).
Correct answer: Chlorofluorocarbons