Cotton Evaluation Quiz
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Questions and Answers

Which of the following statements about cotton is correct?

  • Cotton burns with a bright flame and produces a strong odor.
  • Cotton dissolves completely in a 5% potassium hydroxide solution.
  • Cotton can be distinguished from wool, silk, and nylon by its white ash residue. (correct)
  • Cotton is made up of 90% cellulose and 10% impurities.

    • How can cotton be distinguished from wool, silk, and nylon?

  • By its ability to dissolve in sulfuric acid
  • By its ability to burn with a flare and leave a white ash (correct)
  • By its solubility in potassium hydroxide solution
  • By the presence of a blue color when reacted with iodine

    • What is the main component of cotton?

  • Cellulose (correct)
  • Water
  • Fats and oils
  • Impurities

    • What happens when cotton is ignited?

    <p>It burns with a flare and leaves a small white ash</p> Signup and view all the answers

    Which of the following tests can be used to determine the presence of cellulose in cotton?

    <p>Reacting the cotton with iodine and sulfuric acid</p> Signup and view all the answers

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