An organic compound gives hydrogen on reaction with sodium metal.… - Vidyadip

Question

An organic compound gives hydrogen on reaction with sodium metal. It forms an aldehyde with molecular formula $C_2H_4O$ on oxidation with pyridinium chlorochromate. Give the chemical equations in support of these observations.

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Answer

Ethyl alcohol gives hydrogen on reaction with sodium metal. On oxidation with PCC ethanol will form acetaldehyde $(C_2H_4O)$.

$\underset{\text{Ethyl alcohol}}{2 CH _3- CH _2- OH} \stackrel{2 Na }{\longrightarrow} \underset{\text {sodium ethoxide}}{2 CH _3- CH _2- O ^{-} Na ^{+}+ H _{2( g )} \uparrow}$

$\underset{\text { Ethyl alcohol }}{ CH _3- CH _2- OH } \underset{\text { PCC }}{\stackrel{[ O ]}{\longrightarrow}} \underset{\text { Acetaldehyde }\left( C _2 H _4 O \right)}{ CH _3- CHO }+ H _2 O$

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