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Question
An organic compound gives hydrogen on reaction with sodium metal. It forms an aldehyde with molecular formula C2H4O on oxidation with pyridinium chlorochromate. Give the chemical equations in support of these observations.
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Solution
Ethyl alcohol gives hydrogen on reaction with sodium metal. On oxidation with PCC ethanol will form acetaldehyde (C2H4O).
\[\ce{\underset{\text{Ethyl alcohol}}{2CH3 - CH2 - OH} ->[2Na] \underset{\text{Sodium ethoxide}}{2CH3 - CH2 - O- Na+} + {H_{2(g)}} ^}\]
\[\ce{\underset{\text{Ethyl alcohol}}{CH3 - CH2 - OH} ->[{[O]}][PCC] \underset{\ce{Acetaldehyde(C2H4O)}}{CH3 - CHO} + H2O}\]
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