Carboxylic acids
1. Carboxylic acids are characterized by the presence of which functional group?
a) Hydroxyl (-OH)
b) Carbonyl (C=O)
c) Carboxyl (-COOH)
d) Amine (-NH2)
2. What is the general formula for carboxylic acids?
a) R-COOH
b) R-OH
c) R-CHO
d) R-NH2
3. Carboxylic acids are generally classified as what type of compounds?
a) Weak acids
b) Strong acids
c) Weak bases
d) Strong bases
4. How do carboxylic acids react with bases?
a) They form esters
b) They form amides
c) They form salts
d) They form aldehydes
5. Which of the following is a physical property of carboxylic acids?
a) Low boiling points
b) High solubility in water
c) Pleasant odors
d) Formation of hydrogen bonds
6. Why do carboxylic acids have higher boiling points than alcohols of similar molecular weight?
a) Due to their higher molecular weight
b) Due to the presence of a double bond
c) Due to the presence of hydrogen bonding
d) Due to their lower molecular weight
7. How do carboxylic acids react with alcohols?
a) They form ethers
b) They form esters
c) They form aldehydes
d) They form ketones
8. Which of the following is an example of a carboxylic acid?
a) Ethanol
b) Ethane
c) Ethanoic acid (acetic acid)
d) Ethylamine
9. What is the name of the simplest carboxylic acid?
a) Formic acid
b) Acetic acid
c) Propanoic acid
d) Butanoic acid
10. Which of the following carboxylic acids is responsible for the sour taste of vinegar?
a) Formic acid
b) Acetic acid
c) Propanoic acid
d) Butanoic acid
11. What is the pH of a solution of a carboxylic acid?
a) Greater than 7
b) Less than 7
c) Equal to 7
d) Cannot be determined
12. How do carboxylic acids react with metals?
a) They form salts and hydrogen gas
b) They form esters
c) They form aldehydes
d) They form ketones
13. Which of the following carboxylic acids is used as a food preservative?
a) Formic acid
b) Acetic acid
c) Propanoic acid
d) Butanoic acid
14. What is the IUPAC name for the carboxylic acid with the formula CH3CH2CH2COOH?
a) Butanoic acid
b) Propanoic acid
c) Butanal
d) Butanone
15. Which of the following carboxylic acids is responsible for the smell of rancid butter?
a) Formic acid
b) Acetic acid
c) Butanoic acid
d) Pentanoic acid
16. How do carboxylic acids react with ammonia?
a) They form esters
b) They form amides
c) They form aldehydes
d) They form ketones
17. What is the name of the carboxylic acid used in the production of aspirin?
a) Salicylic acid
b) Benzoic acid
c) Citric acid
d) Acetic acid
18. Which of the following is a physical property of carboxylic acids?
a) Low melting points
b) High solubility in nonpolar solvents
c) Pleasant odors
d) Formation of hydrogen bonds
19. How do carboxylic acids react with thionyl chloride (SOCl2)?
a) They form esters
b) They form acid chlorides
c) They form aldehydes
d) They form ketones
20. Which of the following carboxylic acids is found in citrus fruits?
a) Citric acid
b) Malic acid
c) Tartaric acid
d) Oxalic acid
