the characteristic reactions of aldehydes and ketones are_____reactions.

Explanation

To answer the question regarding the characteristic reactions of aldehydes and ketones, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Aldehydes and Ketones**:
- Aldehydes have the functional group -CHO, while ketones have the functional group -C(=O)-. Both contain a carbonyl group (C=O).

2. **Polarity of the Carbonyl Group**:
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