Question 33
Alkanoic Acids and EstersWhich of the following represents a carboxylic acid?

- A.R—C(OH)=O
- B.R—C(OR)=O
- C.H2SO4
- D.R—COOCOR
- E.R—C(H)=O
Show the answer and explanation
Answer: A (R—C(OH)=O)
Explanation
A carboxylic acid contains the –COOH group: a carbon with a C=O and an –OH. B is an ester and E is an aldehyde.