Which reagent can be employed to distinguish Benzaldehyde and Propanal?

Fehling's Reagent

The correct answer is Option (2) → Fehling's Reagent

To distinguish Benzaldehyde and Propanal:

• Both are aldehydes, so they react with 2,4-DNP to give an orange precipitate. ❌ (cannot distinguish)
• Fehling’s reagent reacts only with aliphatic aldehydes (like Propanal) but not with aromatic aldehydes (like Benzaldehyde). ✅
• Tollen’s reagent reacts with both aromatic and aliphatic aldehydes, forming a silver mirror. ❌
• Baeyer’s reagent (KMnO₄) oxidizes both aldehydes and some alcohols, not selective. ❌