1.

Identify A to E.

Answer»

Solution :Reactions are summarised as follows:
i.
ii.DU in (A) `= ((2n_(C) + 2) - n_(H))/(2) = ((5xx2 + 2) - 8)/(2)= 2^(@)`
III.(A) contains `(---COOH)` group (SODA lime reaction), so 1 DU is present in `(---COOH)` group. Therefore, 1 DU WOULD be due to the presence of `(C=C)` bond, since (A) undergoes oxidation.
iv.Proceeding reverse form the oxidation products of (A):

So the possible STRUCTURE of (A):

Reactions:


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