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6. When left open to oxygen, alcohols turn into carboxylic acids?

  • True
  • False

7. Esters are made from carboxylic acids and ...?

  • Alkene
  • Alcohol
  • Glucose

8. How do you make an ester?

  • Reflux - Distill - Purify - Dry
  • Dry - Dissolve - Purify - Distill
  • Reflux - Dry - Distill - Purify
  • Distill - Purify - Reflux - Dry

9. The arrow in a reversible reaction is the same as in a normal reaction?

  • False
  • True

10. Weak acids are...?

  • Partially ionised
  • Fully ionised
  • Not ionised

11. Which is the best form of chemical analysis?

  • Quantitative
  • Qualitative
  • Chromatography

12. Chromatography uses three phases?

  • False
  • True

13. The Rf value determines the chemical and is found by distance travelled by substance/distance travelled by solvent?

  • True
  • False

14. The calculation for concentration is...?

  • concentration=Rf/mass
  • concentration=volume/Rf
  • concentration=mass/volume
  • mass=concentration/volume

15. Titration's for acids are done using....?

  • Carboxylic acids
  • Esters
  • Alkalis
  • Calcium

16. To produce ethanol you can use yeast or ethene's and steam?

  • True
  • False

17. Why can't you make a high concentration ethanol if you use yeast?

  • The yeast would denature
  • It is not distilled
  • The yeast makes it less strong