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NTA Abhyas JEE Main2020ChemistryAldehydes and KetonesPractice

Which of the following organic compounds answers to both iodoform test and Fehling's test?

Options

  1. AEthanol
  2. BMethanal
  3. CEthanal
  4. DPropanone

Correct answer

C. Ethanal

Step-by-step solution

The compound which contains – C O C H 3 group in its structure, give positive iodoform test and the compound which contains – C H O group give positive Fehling test. In ethanal, C H 3 C H O both the groups are present, hence it responds to both iodoform test and Fehling's test. Iodoform test C H 3 C H O + I 2 + N a O H → C H I 3 + N a I + H 2 O Fehling's test CH 3 CHO + Cu ( OH ) 2 → CH 2 COOH + Cu 2 O ↓ ( red   ppt . ) + 2 H 2 O

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