Write IUPAC names of the following compounds :
`CH_(3)CHO`

Answer

To find the IUPAC name for the compound CH₃CHO, we will follow the systematic steps for naming organic compounds according to IUPAC rules.

### Step-by-Step Solution:

1. **Identify the Structure**: The compound CH₃CHO consists of two carbon atoms. The structure can be represented as:
```
H O
| ||
H-C-C-H
| |
H H
```
Here, one carbon is part of the aldehyde functional group (CHO), and the other is a methyl group (CH₃).

2. **Determine the Parent Chain**: The longest continuous chain of carbon atoms is identified. In this case, there are two carbon atoms, so the parent chain is ethane.

3. **Identify the Functional Group**: The functional group present in the compound is the aldehyde group (CHO). Aldehydes are characterized by the presence of the carbonyl group (C=O) at the end of the carbon chain.

4. **Assign the Suffix**: For aldehydes, the suffix used is "-al". Since we have two carbon atoms, we start with "eth-" (for ethane) and replace the "-e" with "-al". Thus, we get "ethanal".

5. **Final Name**: Since the aldehyde group is always at the first position in the chain, we do not need to specify the position number. Therefore, the IUPAC name for CH₃CHO is simply "ethanal".

### Final Answer:
The IUPAC name of the compound CH₃CHO is **ethanal**.