11. Which of the following is a common use of benzoic acid?

a) Food preservative
b) Paint thinner
c) Nail polish remover
d) Plastic production
Answer: a) Food preservative

12. The IUPAC name for formic acid is:

a) Ethanoic acid
b) Propanoic acid
c) Methanoic acid
d) Butanoic acid
Answer: c) Methanoic acid

13. The reaction of a carboxylic acid with a base produces:

a) An ester
b) A ketone
c) A salt and water
d) An alcohol
Answer: c) A salt and water

14. Which carboxylic acid is present in citrus fruits?

a) Lactic acid
b) Citric acid
c) Acetic acid
d) Oxalic acid
Answer: b) Citric acid

15. The reduction of a carboxylic acid with LiAlH4 results in the formation of:

a) An alcohol
b) An aldehyde
c) A ketone
d) An ester
Answer: a) An alcohol

16. Which of the following acids is known as oxalic acid?

a) Ethanedioic acid
b) Methanoic acid
c) Propanoic acid
d) Butanoic acid
Answer: a) Ethanedioic acid

17. Which of the following describes the acidity of carboxylic acids?

a) They are weaker than alcohols.
b) They are stronger than alcohols.
c) They are neutral compounds.
d) They do not exhibit acidity.
Answer: b) They are stronger than alcohols.

18. Which of the following reactions produces a carboxylic acid from a nitrile?

a) Hydrolysis
b) Oxidation
c) Reduction
d) Dehydration
Answer: a) Hydrolysis

19. The reaction between two carboxylic acids to form an anhydride is called:

a) Esterification
b) Condensation
c) Dehydration
d) Saponification
Answer: c) Dehydration

20. Which of the following is a dicarboxylic acid?

a) Lactic acid
b) Tartaric acid
c) Benzoic acid
d) Succinic acid
Answer: d) Succinic acid