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Class XII problemdistinguish test between CH3CHO and C6H5CH2CHO

Answer»

Iodoform test
Iodoform test is SHOWN only by COMPOUNDS which have three ALPHA hydrogens on the same hydrogen atom.
Acetaldehyde GIVES this test and not 2-phenyl-ethanal.
Reaction-
CH3CHO + NaOH + I2 --> CHI3 + HCOONa


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