How would distinguish between ethanal to methanal
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eth= 2 carbon ...meth= 1 carbon
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Ethanal contains CH3CO group.So, it gives positive iodoform test whereas methanal doesnot give iodoform test.
CH3CHO + 3I2 + 4NaOH →CHI3 + HCOONa + 3NaI + 3H2O Ethanal Yellow ppt.HCHO + I2 + NaOH →no reactionMethanal
CH3CHO + 3I2 + 4NaOH →CHI3 + HCOONa + 3NaI + 3H2O Ethanal Yellow ppt.HCHO + I2 + NaOH →no reactionMethanal
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