Aldehydes and ketones react with electrophiles but not with nucleophiles.

Explanation

### Step-by-Step Solution:

1. **Understanding Aldehydes and Ketones**:
- Aldehydes have the general structure RCHO, where R is a hydrocarbon group and the carbonyl group (C=O) is at the end of the carbon chain.
- Ketones have the structure RC(=O)R', where R and R' are hydrocarbon groups, and the carbonyl group is within the carbon chain.

2. **Defining Electrophiles and Nucleophiles**:
- **Electrophiles** are species that are electron-deficient and can accept electron pairs. They are typically positively charged or neutral species that can attract electrons.
...