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  4. The test that can be used by two distinguish formaldehyde and acetaldehyde, is

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Q. The test that can be used by two distinguish formaldehyde and acetaldehyde, is

CMC MedicalCMC Medical 2015

Solution:

Formaldehyde and acetaldehyde can be distinguish by iodoform test. i.e. $ C{{H}_{3}}-\overset{O}{\mathop{\overset{|\,\,|}{\mathop{C}}\,}}\,-H\xrightarrow{{{I}_{2}},\,\,NaOH} $ $ H-\overset{O}{\mathop{\overset{|\,\,|}{\mathop{C}}\,}}\,-{{O}^{-}}+\underset{\begin{smallmatrix} \,\,\,\,\,Iodoform \\ (yellow\,ppt) \end{smallmatrix}}{\mathop{CH{{I}_{3}}}}\, $