An organic compound [A] having molecular formula `C_2 H_7 N` on treatment with nitrous acid gives a compound [B] having molecular formula `C_2 H_6 O`.[B] on treatment with an organic compound (C) gives a carboxylic acid [D] and a sweet smelling compound (E). Oxidation of [B] with acidified potassium dichromate also gives [D].
Write balanced chemical equation of [D] with chlorine in the presence of red phosphorus and name the reaction.