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STD 12 -8.1. Aldehydes and ketones — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 -8.1. Aldehydes and ketones4 Marks
MCQ
The most appropriate reagent to distinguish between acetaldehyde and formaldehyde is
  • A
    Fehling's solution
  • B
    Tollen's reagent
  • C
    Schiff's reagent
  • ✓
    Iodine in presence of base
✓

Answer

Correct option: D.
Iodine in presence of base
d
(d) Acetaldehyde have $C{H_3}CO - $ group so it give positive iodoform test with ${I_2}$ and $NaOH$ while formaldehyde does not have $ - C{H_3}CO$ group so it will not give the positive haloform test.

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