Aldehydes and ketones undergo nucleophilic/electrophilic addition reactions.

Explanation

### Step-by-Step Solution:

1. **Understanding Aldehydes and Ketones**:
- Aldehydes and ketones are organic compounds that contain a carbonyl group (C=O). In aldehydes, the carbonyl group is at the end of the carbon chain, while in ketones, it is located within the carbon chain.

2. **Polarity of the Carbonyl Group**:
- The carbonyl group is polar due to the difference in electronegativity between carbon and oxygen. Oxygen is more electronegative, creating a partial negative charge (δ-) on the oxygen and a partial positive charge (δ+) on the carbon atom.

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