Surface Tension Quiz 1
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Questions and Answers

What property of disinfectant solutions allows them to spread out on the cell wall of bacteria?

  • Low surface tension (correct)
  • High viscosity
  • Low viscosity
  • High surface tension
  • In the clinical test for jaundice, what is the surface tension of urine with bile present?

  • 70 dynes/cm
  • 60 dynes/cm
  • 66 dynes/cm
  • 55 dynes/cm (correct)
  • What is responsible for lowering the surface tension in washing detergent?

  • Reduced viscosity
  • Increased viscosity
  • Hydrogen bonding
  • Intermolecular cohesive forces (correct)
  • What type of motion do molecules exhibit in gases?

    <p>Random motion</p> Signup and view all the answers

    What shape does a free droplet of liquid naturally assume?

    <p>Spherical shape</p> Signup and view all the answers

    What do molecules on the surface of a liquid have on one side that molecules inside the liquid do not?

    <p>Neighboring molecules only on one side</p> Signup and view all the answers

    What is the relationship between force and the length of the movable side?

    <p>Force is directly proportional to the length</p> Signup and view all the answers

    What does the surface tension of a liquid represent?

    <p>The force required to create a new surface area</p> Signup and view all the answers

    What are surfactant molecules capable of doing when dissolved in a liquid?

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

    How does the solubility of a solute in a liquid affect the surface tension of the liquid?

    <p>Decreases if solute is less soluble, increases if very soluble</p> Signup and view all the answers

    What is the term used for materials possessing chemical groups leading to surface activity when dissolved in a liquid?

    <p>Surface active agents</p> Signup and view all the answers

    What is the relationship between force and the length when considering surface tension?

    <p>Force is directly related to the length</p> Signup and view all the answers

    What defines surfactant molecules?

    <p>They possess chemical groups leading to surface activity when dissolved in a liquid</p> Signup and view all the answers

    What is the dimension of surface tension?

    <p>Force per unit length</p> Signup and view all the answers

    What happens to the surface tension of a liquid if a solute is less soluble in it?

    <p>It decreases</p> Signup and view all the answers

    What is the term used for molecules having both lyophobic and lyophilic regions?

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

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