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MHT CET202619 April 2026Morning ShiftChemistryGeneral Organic ChemistryActual

Which from the following aldehydes contains two - CHO groups in a molecule?

Options

  1. AAcrolein
  2. BO-Tolualdehyde
  3. CPhthaldehyde
  4. DButyraldehyde

Correct answer

C. Phthaldehyde

Step-by-step solution

Acrolein is CH ₂= CH - CHO , which contains one - CHO group. o-Tolualdehyde is o- CH ₃- C ₆ H ₄- CHO , which contains one - CHO group. Phthaldehyde is benzene-1,2-dicarbaldehyde, C ₆ H ₄( CHO )₂ , which contains two - CHO groups. Butyraldehyde is CH ₃- CH ₂- CH ₂- CHO , which contains one - CHO group. Therefore, phthaldehyde contains two - CHO groups. Answer: Phthaldehyde

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