Answer:
(i) The compound with molecular formula forms
a2,4-DNP derivative and reduces Tollen's reagent, so it is an aldehyde.
(ii) It undergoes Cannizzaro reaction,
so the aldehyde group shouldbe directly attached to the benzene ring.
(iii) On vigorous oxidation, it
gives 1,2-benzene dicarboxylic acid, so itshould be an ortho substituted
benzaldehyde, For molecularformula , the
possibility is only o-ethyl benzaldehyde.
(iv) The equations for all
the reactions are given below:
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