Give IUPAC name of Acetone

Options

A. Ethanal
B. Propanone
C. Butanone
D. Propanal.

Explanation

To determine the IUPAC name of acetone, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Structure of Acetone**:
- Acetone has the chemical formula \( \text{CH}_3\text{C(=O)}\text{CH}_3 \). This indicates that it contains a carbonyl group (C=O) flanked by two methyl groups (CH3).

2. **Count the Carbon Atoms**:
- In the structure of acetone, there are a total of three carbon atoms.

3. **Determine the Longest Carbon Chain**:
- The longest continuous carbon chain consists of three carbon atoms.

4. **Number the Carbon Atoms**:
- Start numbering the carbon chain from the end closest to the functional group (the carbonyl group). This ensures that the functional group receives the lowest possible number.
- The numbering will be:
- C1 (CH3) - C2 (C=O) - C3 (CH3)

5. **Identify the Base Name**:
- Since there are three carbon atoms in the longest chain, the base name will be derived from "propane".

6. **Identify the Functional Group**:
- The functional group present is a ketone, which is indicated by the presence of the carbonyl group (C=O) between two carbon atoms.

7. **Formulate the IUPAC Name**:
- For ketones, the suffix "-one" is used. Therefore, combining the base name "propane" with the suffix "-one" gives us "propanone".

8. **Final Answer**:
- The IUPAC name of acetone is **propanone**.