Atmospheric Regions Quiz
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Questions and Answers

Which layer of the atmosphere exhibits a temperature inversion?

  • Troposphere
  • Mesosphere
  • Thermosphere
  • Stratosphere (correct)
  • What is the principal cause of the ionization reactions in the thermosphere?

  • High temperature collisions
  • Ultraviolet radiation from the Sun (correct)
  • Cosmic rays
  • Lightning discharges
  • Which layer of the atmosphere is responsible for filtering out harmful UV-B radiation?

  • Stratosphere (correct)
  • Troposphere
  • Mesosphere
  • Thermosphere
  • Which of the following statements about the troposphere is true?

    <p>It is well-mixed due to convection currents</p> Signup and view all the answers

    What is the approximate temperature range in the mesosphere?

    <p>180-275 K</p> Signup and view all the answers

    Which of the following reactions occurs in the thermosphere due to UV radiation?

    <p>$N_2 + hv (80 ,nm) \rightarrow N_2^+ + e^-$</p> Signup and view all the answers

    What is the approximate altitude range of the mesosphere?

    <p>50-85 km</p> Signup and view all the answers

    Which layer of the atmosphere experiences a stable region with less convective mixing?

    <p>Stratosphere</p> Signup and view all the answers

    What is the principal species found in the thermosphere near vacuum conditions?

    <p>Ions (ionosphere)</p> Signup and view all the answers

    At which region of the atmosphere do temperatures increase significantly with altitude?

    <p>Thermosphere</p> Signup and view all the answers

    Which layer of the atmosphere constitutes the majority of the total mass of the atmosphere?

    <p>Troposphere</p> Signup and view all the answers

    What is the temperature range in the stratosphere?

    <p>$180 - 275$ K</p> Signup and view all the answers

    Which layer of the atmosphere has a chemical composition mainly consisting of O2 and N2?

    <p>Stratosphere</p> Signup and view all the answers

    At which altitude does the temperature decrease to approximately $-90$ degrees C?

    <p>$50 - 85$ km</p> Signup and view all the answers

    What is the primary mechanism for the oxidation of volatile organic compounds (VOCs)?

    <p>H abstraction or HO addition</p> Signup and view all the answers

    What is the ultimate stable product formed from the oxidation of VOCs?

    <p>Carbon dioxide (CO2) and water (H2O)</p> Signup and view all the answers

    Which of the following is an example of a gaseous organic pollutant?

    <p>Chlorofluorocarbons (CFCs)</p> Signup and view all the answers

    What is the threshold limit value (TLV) for nitric acid (HNO3) exposure?

    <p>2 ppm</p> Signup and view all the answers

    Which of the following heavy metals is known to cause kidney and nerve damage?

    <p>Both (a) and (b)</p> Signup and view all the answers

    What is the primary reason for the increased toxicity of alkyl metal compounds compared to their inorganic counterparts?

    <p>They can penetrate cell membranes more easily</p> Signup and view all the answers

    Which of the following heavy metals is used by detoxifying enzymes in the body?

    <p>Selenium (Se) and manganese (Mn)</p> Signup and view all the answers

    What is the primary use of hydrofluoric acid (HF) mentioned in the text?

    <p>Manufacturing semiconductors and silicon chips</p> Signup and view all the answers

    Which of the following heavy metals is known to interfere with the metabolism of copper (Cu) and zinc (Zn)?

    <p>Cadmium (Cd)</p> Signup and view all the answers

    What is the primary use of sulfuric acid (H2SO4) mentioned in the text?

    <p>Manufacturing fertilizers and batteries</p> Signup and view all the answers

    Which of the following is the most toxic form of chromium?

    <p>Chromium(VI)</p> Signup and view all the answers

    What is the primary cause of Minamata disease?

    <p>Ingestion of methylmercury-contaminated fish</p> Signup and view all the answers

    Which of the following is a primary use of cadmium?

    <p>Production of pigments and stabilizers for plastics</p> Signup and view all the answers

    What is the primary target of cadmium toxicity?

    <p>Kidneys, due to the role of metallothionein</p> Signup and view all the answers

    Which of the following is a primary use of organotin compounds?

    <p>Antifouling paints for ships</p> Signup and view all the answers

    Which type of ionizing radiation is the most penetrating?

    <p>Gamma rays</p> Signup and view all the answers

    Which of the following radionuclides is known to cause thyroid cancer?

    <p>Iodine-131 (I-131)</p> Signup and view all the answers

    What is the primary mechanism by which lead causes anemia?

    <p>Both inhibition of heme synthesis and destruction of RBCs</p> Signup and view all the answers

    Which of the following is a primary anthropogenic source of lead in the environment?

    <p>Waste from high-temperature processes in various industries</p> Signup and view all the answers

    Which of the following is a primary target of mercury toxicity?

    <p>Nervous system</p> Signup and view all the answers

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