Q33. Which of these molecules is a ketone? Name the other functional groups also.

Background

Topic: Organic Functional Groups

This question tests your ability to recognize and distinguish between different organic functional groups, specifically ketones, esters, carboxylic acids, and aldehydes, based on their structural formulas.

Key Terms and Formulas

• Ketone: A compound with a carbonyl group (C=O) bonded to two carbon atoms (R-CO-R').

• Carboxylic Acid: A compound with a carbonyl group bonded to an -OH group (R-COOH).

• Ester: A compound with a carbonyl group bonded to an -OR group (R-COOR').

• Aldehyde: A compound with a carbonyl group bonded to at least one hydrogen (R-CHO).

Step-by-Step Guidance

1. Examine each structure and identify the group attached to the carbonyl carbon (the carbon double-bonded to oxygen).

2. Recall that a ketone has two carbon groups attached to the carbonyl carbon, while an aldehyde has at least one hydrogen, a carboxylic acid has an -OH, and an ester has an -OR group.

3. For each structure:

   • Check if the carbonyl carbon is bonded to two carbons (for ketone).

   • Check if the carbonyl carbon is bonded to an -OH group (for carboxylic acid).

   • Check if the carbonyl carbon is bonded to an -OR group (for ester).

   • Check if the carbonyl carbon is bonded to a hydrogen (for aldehyde).

4. Assign the correct functional group to each structure based on your analysis.

5. Stop here and try to match each structure to its functional group before revealing the answer.

Try solving on your own before revealing the answer!