Question

Write the differences between acetaldehyde and benzaldehyde.

Answer 1

Reactions	Acetaldehyde ${CH}_{3}CHO$	Benzaldehyde $C_6{H}_{5}CHO$
(1) Heating with Fehling's solution	gives a red precipitate	no reaction
(2) With ammonia	forms simple addition product	forms complex, condensation product
(3) With caustic soda	undergoes Aldol product	undergoes Cannizzaro reaction
(4) With primary amines	does not form Schiff's base	forms Schiff's base
(5) With chlorine	does not form acetyl chloride	forms benzoyl chloride
(6) Polymerisation	undergoes polymerisation	does not polymerise
(7) Electrophilic substitution	does not under go	undergo at meta position
(8) With Schiff's reagent	gives pink colour in cold	gives pink colour