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  4. Self condensation of acetaldehyde, in the presence of dilute alkalies gives

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Q. Self condensation of acetaldehyde, in the presence of dilute alkalies gives

WBJEEWBJEE 2007

Solution:

The self condensation of acetaldehyde in presence of dilute alkalies is called aldol condensation.
$ C{{H}_{3}}-\overset{H}{{\overset{|}{{C}}\,}}\,=O+HC{{H}_{2}}-\overset{O}{{\overset{||}{{C}}\,}}\,-H $
$ \xrightarrow{dil\,NaOH}C{{H}_{3}}-\underset{aldol}{{\underset{OH}{\overset{H}{{\underset{|}{\overset{|}{{C}}}\,}}}\,}}\,-C{{H}_{2}}-\overset{O}{{\overset{||}{{C}}\,}}\,-H $