This type of functional group is often sweet smelling and may be used as a fragrance. When it reacts with water it will produce a carboxylic acid and an alcohol.

I chose ester but it is wrong

I agree with your answer.

When you put it in Lon-Capa do not capitalize the first letter.

If ester was not the correct answer, let's go through the process of finding the correct functional group based on the given information.

We are looking for a functional group that is often sweet smelling, used as a fragrance, and reacts with water to produce a carboxylic acid and an alcohol.

The correct functional group that fits these characteristics is an aldehyde. Aldehydes often have pleasant, sweet aromas and are commonly used in perfumes and fragrances. When an aldehyde reacts with water, it undergoes hydration and forms a carboxylic acid and an alcohol.

To find the answer, we can apply the process of elimination. Here are the other options and why they do not fit the given characteristics:

1. Ester: Although esters can have pleasant aromas, they do not produce carboxylic acids and alcohols when reacted with water. Instead, esters hydrolyze to form carboxylic acids and alcohols in the presence of acids or bases.

2. Ketone: Ketones do not have a pleasant, sweet smell. They are more commonly associated with odors like nail polish remover. Additionally, when ketones react with water, they do not form carboxylic acids and alcohols.

3. Amine: Amines have a variety of smells, but they are typically described as "fishy" or "ammonia-like," rather than sweet. Amines do not react with water to form carboxylic acids and alcohols.

Therefore, based on the given information, the correct answer is an aldehyde.