Name the aldehyde which does not give Fehling's solution test.

Explanation

To answer the question regarding the aldehyde that does not give a positive Fehling's solution test, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Fehling's Solution**: Fehling's solution is a chemical test used to differentiate between aldehydes and ketones. It consists of two solutions, Fehling A (copper(II) sulfate) and Fehling B (alkaline tartrate solution). When an aldehyde is present, it reduces the copper(II) ions to copper(I) oxide, resulting in a red precipitate.

2. **Identify the Limitation**: The test is primarily effective for aldehydes that have at least one alpha hydrogen atom. Aldehydes without alpha hydrogen cannot form enolates, which are necessary for the reaction with Fehling's solution.

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