Answer:
The correct option is C.
Explanation
Option A
Amines are the organic compounds which contain amino functional groups (-NH2), i.e 1-Propamine (CH3-CH2-CH2-NH2). so this is incorrect option.
Option B
Phosphate group is present in group of organic compounds known as organic phosphates. they are involved in energy transfer reaction. the best example is ATP. This option is also incorrect.
Option C
option C is correct because Acetic acid belongs to a group of organic compounds known as carboxylic acids. Carboxylic acid is characterized by the presence of carboxyl functional group (-COOH).
Conclusion
it is concluded that acetic acid contains carboxyl group.
Answer;
C. carboxyl group
Explanation;
-Vinegar is a common household item containing acetic acid as well as some other chemicals.
-Acetic acid is an organic acid with the formula CH3-COOH. Its functional group is carboxylic acid group. Acetic acid is a monocarboxylic acid because it contains only one "COOH"group. It has a sour taste and pungent smell.
