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Environmental Chemistry Test - 36

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Environmental Chemistry Test - 36
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Weekly Quiz Competition
  • Question 1
    1 / -0
    _______ or using plants (such as willow) to extract heavy metals can prevent soil pollution.
    Solution
    Phytoremediation, or using plants (such as willow) to extract heavy metals can be an effective method to prevent soil pollution.
  • Question 2
    1 / -0
    Current commercial method for producing ibuprofen is a stunning application of Green chemistry because ______ .
    Solution
    The current commercial method for producing ibuprofen is a stunning application of green chemistry. Conventional methods of ibuprofen production requires six steps, hence, used large amounts of solvents and generated large amount of wastes. Current methods of ibuprofen production has just three steps and minimal waste, and is an application of Green chemistry.
  • Question 3
    1 / -0
    Whenever practicable, synthetic methods should be designed to use and generate substances that are little or not toxic to human health and environment, is an objective of:
    Solution
    Green chemistry also called sustainable chemistry, is an area of chemistry and chemical engineering, focused on the designing of products and processes that minimize the use of generation of hazardous substances.
  • Question 4
    1 / -0
    The design, development and implementation of chemical products and process to reduce or eliminate the use and generation of substances hazardous to human health and environment is called ________ .
    Solution
    The design, development and implementation of chemical products and processes to reduce or eliminate the use and generation of substances hazardous to human health and environment, is called Green Chemistry.
    Waste Management is all the activities and actions required to manage waste from its inception to its final disposal.
    Environmental Chemistry is the scientific study of the chemical and biochemical phenomena that occur in natural places.
    It should not be confused with Green Chemistry, which seeks to reduce potential pollution at its source.
  • Question 5
    1 / -0
    To manufacture computer chips, many chemicals, large amounts of water, and energy are required which is harmful to environment. a process is discovered which significantly reduces the quantities of chemicals, energy, and water needed to produce chips. This is an application of:
    Solution
    Green chemistry seeks to develop products and processes that are kind to the environment. This can involve reducing the waste a process creates, using renewable materials, lessening the energy required to form a product, etc.
  • Question 6
    1 / -0
    ______ or using fungus to metabolize contaminants and accumulate heavy metals.
    Solution
    Mycoremediation is a form of bioremediation, the process of using fungi to degrade or sequester contaminants in the environment. Stimulating microbial and enzyme activity, mycelium reduces toxins in-situ. Some fungi are hyperaccumulators, capable of absorbing and concentrating heavy metals in the mushroom fruit bodies.
  • Question 7
    1 / -0
    Chlorofluorocarbons have been in use in refrigerators and air conditioners are proved to be unfriendly to the environment. Substitutes to these compounds which are friendly to the environment are:
    Solution
    The first three compounds are chlorofluoro carbons which are harmful to ozone and unfriendly to the environment. These are used in refrigerators. So a compound called $$CF_3CH_2F$$ was discovered, which is friendly to the environment and used in refrigerators.
  • Question 8
    1 / -0
    Which of the following reactions does not occur in stratosphere?
    Solution
    Stratosphere consist of ozone and UV rays from sun which causes all the first three reactions in stratosphere. There is no water or sulphur dioxide in stratosphere to carry out the fourth reaction. Hence, answer is D.
  • Question 9
    1 / -0
    Which of the following reaction occur when urea is added to soil as a fertilizer?
    Solution
    Urea is a major fertilizer used worldwide. It provides nitrogen to the soil by decomposing to ammonia and $$CO_2$$ when acted on by urease, an enzyme in soils. Then, ammonia is taken by the plants.

    $$N{ H }_{ 2 }CON{ H }_{ 2 }+{ H }_{ 2 }O\longrightarrow 2N{ H }_{ 3 }+C{ O }_{ 2 }$$

    Hence the correct option is B.
  • Question 10
    1 / -0
    Plastics being developed from eco-friendly renewable sources, plus some modern plastics are biodegradable is one of the achievements of________.
    Solution
    Green chemistry seeks to develop products and processes that are kind to the environment.
    Plastics being developed from eco-friendly renewable sources, plus some modern plastics are biodegradable. The combination of innovations reduces our dependence on petroleum products, protects humans and wildlife from undesirable chemicals in old plastics, and reduces waste and impact on the environment.
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