Air Pollution - Chlorofluorocarbons (Cfcs)

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| By L-ionel
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L-ionel
Community Contributor
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Air Pollution - Chlorofluorocarbons (Cfcs) - Quiz

This quiz will test your understanding on chlorofluorocarbons.


Questions and Answers
  • 1. 

    Are chlorofluorcarbons toxic, flammable and carcinogenic(cancer-causing)?

    • A.

      Yes

    • B.

      No

    Correct Answer
    B. No
    Explanation
    Chlorofluorocarbons (CFCs) are not toxic, flammable, or carcinogenic. They were widely used in the past as refrigerants, propellants, and solvents, but their production has been phased out due to their harmful effects on the ozone layer. While CFCs are not directly toxic or flammable, they can contribute to the formation of harmful substances in the atmosphere, such as ozone-depleting compounds. However, they are not considered carcinogenic.

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  • 2. 

    Is coolants in refrigerators and air conditioners a source of chlorofluorocarbons?

    • A.

      Yes

    • B.

      No

    Correct Answer
    A. Yes
    Explanation
    Coolants in refrigerators and air conditioners are indeed a source of chlorofluorocarbons (CFCs). CFCs are synthetic compounds that contain carbon, chlorine, and fluorine atoms. They were commonly used as coolants in these appliances due to their low boiling points and stability. However, CFCs have been found to be harmful to the ozone layer when released into the atmosphere. They have been phased out and replaced with more environmentally friendly alternatives, but older appliances may still contain CFCs. Therefore, coolants in refrigerators and air conditioners can be a source of these ozone-depleting substances.

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  • 3. 

    Chlorofluorocarbons are very reactive.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Chlorofluorocarbons (CFCs) are not very reactive. In fact, they are known for their stability and lack of reactivity, which is why they were widely used in various industries. CFCs are synthetic compounds made up of carbon, chlorine, and fluorine atoms, and their low reactivity allowed them to be used as refrigerants, propellants, and solvents. However, their stability also led to their negative impact on the environment, as CFCs were found to deplete the ozone layer when released into the atmosphere.

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  • 4. 

    What breaks down CFCs to form chlorine and fluorine atoms?

    • A.

      Nitrogen oxides

    • B.

      Ultraviolet rays

    • C.

      Sulfur dioxides

    Correct Answer
    B. Ultraviolet rays
    Explanation
    Ultraviolet rays break down CFCs to form chlorine and fluorine atoms. CFCs (chlorofluorocarbons) are a type of synthetic compounds that contain chlorine, fluorine, and carbon. When CFCs are exposed to ultraviolet rays in the upper atmosphere, the high-energy UV radiation breaks the bonds between the chlorine and carbon atoms, releasing chlorine atoms. These chlorine atoms then react with ozone molecules, leading to the destruction of the ozone layer. The fluorine atoms released from the breakdown of CFCs do not play a significant role in ozone depletion.

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  • 5. 

    How CFCs destroy the ozone layer?

    • A.

      Chlorine atoms react with ozone

    • B.

      Fluorine atoms react with ozone

    • C.

      Both atoms reacts with ozone

    Correct Answer
    A. Chlorine atoms react with ozone
    Explanation
    CFCs (chlorofluorocarbons) contain chlorine atoms, which are released into the atmosphere. When these chlorine atoms come into contact with ozone molecules in the ozone layer, they react and break down the ozone molecules. This reaction is known as ozone depletion. As a result, the ozone layer becomes thinner, allowing harmful ultraviolet (UV) radiation from the sun to reach the Earth's surface. This UV radiation can cause various health issues in humans, such as skin cancer, cataracts, and weakened immune system, and also harm marine life and ecosystems. Therefore, the presence of chlorine atoms in CFCs contributes to the destruction of the ozone layer.

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  • Current Version
  • Mar 22, 2022
    Quiz Edited by
    ProProfs Editorial Team
  • Sep 13, 2009
    Quiz Created by
    L-ionel
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