CH3CHO and C6H5CH2CHO both being aliphatic aldehydes react with Tollen's reagent, Fehling solution and Benedict solution. So, these reagents cannot be used to distinguish them. CH3CHO reacts with NaOH and I2 to give yellow crystals of iodoform while C6H5CH2CHO does not react with it. CH3CHO+3I2+C6H5CH2CHO+I24NaOH⟶CHI3+HCOONa+3NaI+3H2O+NaOH⟶No reaction Thus, CH3CHO and C6H5CH2CHO can be distinguished by iodoform test.
CH_3 CHO and C_6 H_5 CH_2 CHO can be distinguished chemically by
NEET UG 2012 — Chemistry Organic Chemistry
2012mcqmedium
CH3CHO and C6H5CH2CHO can be distinguished chemically by
Official previous-year question
Held on 30 Apr 2012 · Verified 9 Jul 2026.
Options
- A
Benedict test
- B
Iodoform test
- C
Tollen's reagent test
- D
Fehling solution test
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