What is the general formula for aldehydes?

The general formula for aldehydes is: R–CHO

• R = an alkyl group (like CH₃, C₂H₅, etc.) or hydrogen.
• CHO = the aldehyde group (–C=O with one hydrogen attached).

Example:

• If R = H → HCHO (formaldehyde)
• If R = CH₃ → CH₃CHO (acetaldehyde)