Surface Tension
20 Questions
0 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 is the main characteristic of surface tension?

  • The ability of liquid surfaces to resist internal forces
  • The tendency of liquid surfaces to shrink into a minimum surface area (correct)
  • The tendency of liquid surfaces to expand into a maximum surface area
  • The ability of liquid surfaces to attract external forces

    • What is the term for the attraction between water molecules?

  • Electrolysis
  • Cohesion (correct)
  • Surface tension
  • Adhesion

    • What is the primary function of surfactants?

  • To increase surface tension
  • To increase the viscosity of a liquid
  • To decrease surface tension (correct)
  • To change the pH of a solution

    • What is the characteristic of non-ionic surfactants?

    <p>They are compatible with anionic and cationic S.A.A.</p> Signup and view all the answers

    What is the disadvantage of anionic surfactants?

    <p>They are not suitable for oral use due to unpleasant taste and irritant action to the mucosa</p> Signup and view all the answers

    What is the term for surfactants that have both polar and non-polar groups?

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

    What is the critical micelle concentration (CMC) of a surfactant?

    <p>The lowest concentration at which micelles first appear</p> Signup and view all the answers

    What happens to the solubility of surfactants when the temperature is increased?

    <p>It increases slowly until the Kraft point, then increases rapidly</p> Signup and view all the answers

    What is the term for the temperature at which the solubility of surfactants increases rapidly?

    <p>Kraft point</p> Signup and view all the answers

    What is the property of surfactants that allows them to increase the solubility of organic compounds in aqueous systems?

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

    Where are non-polar materials such as aliphatic hydrocarbons dissolved in micelles?

    <p>In the non-polar cores of the micelles</p> Signup and view all the answers

    What is the term for the concentration of surfactants in solution at the Kraft point?

    <p>CMC at the Kraft temperature</p> Signup and view all the answers

    What is the purpose of surface active agents in medical applications?

    <p>As antimicrobials, expectorants, and cleansing agents</p> Signup and view all the answers

    What is the opposite of sorption?

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

    What is the type of adsorption that occurs due to chemical combination of adsorbate molecules and the surface molecules of adsorbent?

    <p>Chemical adsorption</p> Signup and view all the answers

    What happens to adsorption when the particle size of the adsorbent is reduced?

    <p>Adsorption increases</p> Signup and view all the answers

    What is the nature of most adsorption processes?

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

    What factor affects adsorption, where an increase in solute concentration leads to an increase in adsorption up to a limited value?

    <p>Solute concentration</p> Signup and view all the answers

    What is the effect of increase in temperature on the amount of adsorption?

    <p>It decreases the amount of adsorption.</p> Signup and view all the answers

    What is the reason for the increase in adsorption with the increase in molecular weight of solutes?

    <p>Due to increase in Van Der Waals forces of attraction.</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser