Answer all the questions below to test your knowledge on the reactions and properties of esters. Hit the check answer button to get your score when you have completed the quiz.
1. Which two substances react to form an ester?
2. What type of reaction is esterification?
3. What acid is commonly used as a catalyst in esterification?
4. A condensation reaction is one where two molecules react to form a new larger and release a small molecule; usually water.
5. What does it mean when an ester is said to be volatile?
6. What ester if formed from methanol and ethanoic acid?
7. Why are esters commonly used in perfumes?
8. What role do esters play as emollients?
a) Ensure neutral pH is maintained b) Make the creams and lotions smell better c) Act as a preservative d) Trap moisture on the skin
9. What functional group is present in an ester molecule?
a) -COOH b) -COO- c) -OH d) CHO
10. Esters are often used as emulsifiers in creams and lotions, what is the purpose of an emulsifier?
a) To enable two immiscible liquids to mix b) To clean and refresh the skin c) They act as preservatives and make the creams last longer d) They give the creams a pleasant smell
