Hydrazones of aldehydes and ketones are not prepared in highly acidic medium. Explain.

Explanation

### Step-by-Step Solution:

1. **Understanding Hydrazones**: Hydrazones are compounds formed by the reaction of aldehydes or ketones with hydrazine (NH2NH2). The general reaction can be represented as:
\[ RCHO + NH_2NH_2 \rightarrow RCH=NNH_2 + H_2O \]
where R represents an alkyl or aryl group.

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