Air Composition and Properties Quiz
46 Questions
2 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What percentage of air is made up of nitrogen?

  • 35%
  • 78% (correct)
  • 90%
  • 50%

    • Which of the following statements about nitrogen is NOT true?

  • Nitrogen is converted into nitrates by plants.
  • Nitrogen supports combustion. (correct)
  • Nitrogen helps in protein synthesis.
  • Nitrogen is used in food preservation.

    • In addition to nitrogen and oxygen, what other components are found in air?

  • Carbon dioxide, water vapor, and impurities (correct)
  • Primarily hydrogen and methane
  • Only inert gases and dust particles
  • Noble gases and ozone

    • How does nitrogen contribute to food preservation?

    <p>By displacing oxygen in packaging</p> Signup and view all the answers

    What is the approximate volume percentage of carbon dioxide in the air?

    <p>0.02-0.03%</p> Signup and view all the answers

    What role does water vapor play in the ecosystem?

    <p>It is responsible for the formation of clouds and precipitation.</p> Signup and view all the answers

    What happens when air with excess water vapor is present?

    <p>It leads to the formation of various weather conditions.</p> Signup and view all the answers

    What is indicated by the color change of cobalt chloride paper during the experiment?

    <p>The existence of water vapor in the air.</p> Signup and view all the answers

    Which inert gas is primarily used for lighting in advertisement signs?

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

    What is a consequence of dust particles in relation to water vapor?

    <p>They provide a surface for water vapor to condense upon.</p> Signup and view all the answers

    What happens to the water when the neck of the bottle is submerged in the tub of water?

    <p>No water enters the bottle initially.</p> Signup and view all the answers

    According to Antoine Lavoisier's findings, what is the volume ratio of oxygen to nitrogen in air?

    <p>1:4</p> Signup and view all the answers

    Which of the following accurately describes air?

    <p>A mixture of various gases.</p> Signup and view all the answers

    What conclusion can be drawn from the activity with the empty bottle and water?

    <p>Air takes up space, demonstrating it is present everywhere.</p> Signup and view all the answers

    What did John Mayow contribute to the understanding of air?

    <p>He demonstrated that air is a mixture of gases.</p> Signup and view all the answers

    What does the experiment with phosphorus demonstrate about the air used for burning?

    <p>One-fifth of the air's volume consists of oxygen.</p> Signup and view all the answers

    In the demonstration of carbon dioxide's presence in air, what suggests the presence of carbon dioxide when lime water turns milky?

    <p>Carbon dioxide reacts with calcium hydroxide in the lime water.</p> Signup and view all the answers

    What happens to the water level in the container during the burning of phosphorus?

    <p>It rises by one-fifth of the original empty space.</p> Signup and view all the answers

    Which of the following is NOT a use of carbon dioxide?

    <p>Supporting combustion in fire extinguishers.</p> Signup and view all the answers

    What can be inferred about the unburnt phosphorus remaining after the burning process?

    <p>It shows that phosphorus does not always burn completely.</p> Signup and view all the answers

    What is the primary process that removes carbon dioxide from the atmosphere?

    <p>Photosynthesis by green plants</p> Signup and view all the answers

    Which of the following is a significant contributor to the increase of carbon dioxide levels in the atmosphere?

    <p>Increased deforestation</p> Signup and view all the answers

    How does population growth influence carbon dioxide emissions?

    <p>Leads to more fossil fuel usage</p> Signup and view all the answers

    What historical data indicates a rise in carbon dioxide since pre-industrial times?

    <p>Measurements from trapped air in polar ice</p> Signup and view all the answers

    What role do technological advancements play in carbon dioxide emissions?

    <p>They frequently result in increased fuel use</p> Signup and view all the answers

    What was the primary method Carl Wilhelm Scheele used to discover oxygen?

    <p>Heating potassium nitrate and mercury oxide</p> Signup and view all the answers

    Which of the following correctly represents the respiration process involving oxygen?

    <p>Food + oxygen → carbon dioxide + energy + water vapor</p> Signup and view all the answers

    Why does the candle extinguish when covered with a bell jar during the demonstration?

    <p>The oxygen available inside the jar is used up.</p> Signup and view all the answers

    In the activity demonstrating that one-fifth of the air supports combustion, how is the phosphorus ignited?

    <p>With a hot iron wire.</p> Signup and view all the answers

    What is the significance of marking the water level in the bell jar during the experiment?

    <p>To measure the air volume above the water in terms of combustion.</p> Signup and view all the answers

    Which of the following statements about the role of oxygen is incorrect?

    <p>Oxygen is not necessary for combustion.</p> Signup and view all the answers

    During the activity involving red phosphorus, why is caution emphasized in handling it?

    <p>It undergoes spontaneous combustion.</p> Signup and view all the answers

    What is the expected outcome when the phosphorus is ignited inside the bell jar?

    <p>The available air above the water will be depleted.</p> Signup and view all the answers

    Which process involves the utilization of oxygen to produce energy from food?

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

    What is primarily responsible for the reddish-brown flaky substance known as rust?

    <p>Iron reacting with oxygen in moist conditions</p> Signup and view all the answers

    Which of the following conditions is NOT necessary for rusting to occur?

    <p>High temperature</p> Signup and view all the answers

    How does the atmosphere contribute to maintaining Earth's temperature?

    <p>By trapping heat during the night</p> Signup and view all the answers

    What role does the atmosphere play in aiding plant reproduction?

    <p>It facilitates seed dispersal and pollination</p> Signup and view all the answers

    What role does carbon dioxide play in photosynthesis?

    <p>It is necessary for the formation of glucose.</p> Signup and view all the answers

    Which gas is primarily responsible for supporting combustion?

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

    What is the significance of dust particles in the air?

    <p>They help in rain formation and cooling the earth.</p> Signup and view all the answers

    Which of the following gases is not involved in protein synthesis?

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

    What industrial process is used to separate oxygen, nitrogen, and argon from air?

    <p>Fractional Distillation</p> Signup and view all the answers

    Which statement about water vapor in the atmosphere is correct?

    <p>It contributes to the greenhouse effect.</p> Signup and view all the answers

    What is the primary function of inert gases like helium and neon in the atmosphere?

    <p>They are used for various industrial applications.</p> Signup and view all the answers

    Which component of air is important for controlling evaporation?

    <p>Water Vapor</p> Signup and view all the answers

    Study Notes

    Air and Atmosphere

    • Air is a mixture of gases, mainly consisting of nitrogen and oxygen.
    • About 78% of air is nitrogen, 21% is oxygen, and 1% is other gases.
    • Also contains water vapour and dust particles.
    • The composition of air varies from place to place and with altitude.
    • Air helps in protein synthesis.
    • Controls combustion of substances.
    • Used in the manufacturing of ammonia, fertilizers, and other chemicals
    • Used in the food industry for food preservation.
    • Dust particles in the air result in the cooling of the earth.
    • Excess dust causes respiratory problems like asthma and bronchitis
    • Water vapor in the air determines climate conditions. It is converted into rain, snow, etc.
    • Water vapor provides water for plants and animals
    • Inert gases (like Helium, Neon, Argon, Krypton, Xenon) are used in weather balloons, advertising signs, ordinary electric bulbs, and photography.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    Test your knowledge on the composition of air and the role of nitrogen and other gases in the atmosphere. This quiz covers essential concepts related to air quality, the significance of water vapor, and the historical contributions of scientists in understanding air. Perfect for students studying environmental science or chemistry.

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser