Biodiesel Viscosity and Gelling Quiz
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Questions and Answers

What method can be used to approximate the viscosity of the original vegetable oil and biodiesel in the lab?

  • Comparing the gel formation temperatures
  • Measuring the density
  • Calculating the theoretical yield
  • Measuring the time it takes for a known amount of the liquid to flow out of a pipette (correct)

    • At what temperature does pure biodiesel typically gel?

  • -10°C
  • 0°C (correct)
  • 20°C
  • 10°C

    • What is a good indication of the onset of gel formation in biodiesel?

  • Density measurement
  • Cloudiness in the liquid (correct)
  • Comparing colors under light
  • Calculating percentage yield

    • What role does an ice-salt bath play in observing gel formation in biodiesel mixtures?

    <p>Reducing gelling temperature</p> Signup and view all the answers

    What is sodium hydroxide's role in the production of biodiesel from vegetable oil?

    <p>Catalyzing transesterification</p> Signup and view all the answers

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