Hydrogen Bonds in Water
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Questions and Answers

What gives water some key properties?

  • Formation of hydrogen bonds (correct)
  • Presence of ionic bonds
  • Lack of any type of bonds
  • Formation of covalent bonds
  • What type of molecule is water?

  • Nonpolar molecule
  • Ionic molecule
  • Covalent molecule
  • Polar molecule (correct)
  • What occurs due to the attraction between the positively charged oxygen and the negatively charged hydrogen in water?

  • Formation of ionic bonds
  • Formation of covalent bonds
  • No specific interaction occurs
  • Formation of hydrogen bonds (correct)
  • What do hydrogen bonds cause between 0°C and 100°C?

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

    What must happen in order for water to evaporate?

    <p>Hydrogen bonds must be broken</p> Signup and view all the answers

    Why does water remain a liquid up to 100°C?

    <p>It takes a lot of energy to break the hydrogen bonds</p> Signup and view all the answers

    What happens to the formation of hydrogen bonds between water molecules at 0°C?

    <p>More hydrogen bonds form, holding the water in a stationary position and forming ice</p> Signup and view all the answers

    Why does ice float in water?

    <p>Ice forms an open lattice structure, making it less dense than water</p> Signup and view all the answers

    What property of water makes it essential for the survival of aquatic organisms in terms of temperature regulation?

    <p>High specific heat capacity</p> Signup and view all the answers

    Why does the surface tension of water create a habitat for invertebrates like pond skaters?

    <p>It attracts water molecules to each other, producing surface tension</p> Signup and view all the answers

    How does the high latent heat of vaporisation of water benefit living things?

    <p>It provides a mechanism for cooling the surface of living things</p> Signup and view all the answers

    What enables water to transport substances around the body?

    <p>Cohesion and surface tension</p> Signup and view all the answers

    Why does a body of water maintain a fairly constant temperature?

    <p>The high specific heat capacity of water</p> Signup and view all the answers

    What is the role of ice in supporting organisms below its surface?

    <p>Ice forms an insulating layer, preventing the water below from freezing and supporting organisms</p> Signup and view all the answers

    Why does sweating help in cooling the surface of living things?

    <p>Evaporation of sweat requires a lot of energy due to high latent heat of vaporisation</p> Signup and view all the answers

    How does the transparency of water benefit aquatic plants?

    <p>It enables aquatic plants to carry out photosynthesis underwater</p> Signup and view all the answers

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