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Q 2657278184.     (a) Compound `A (C_8 H_8 O)` on treatment with `NH_2OH`. `HCl` given B and C, B and C rearrange to give D and E, respectively, on treatment with acid. B, C, D and E are all isomers of molecular formula `(C_8 H_9 NO)`. When D is boiled with alcoholic `KOH`, an oil `F (C_6H_7N)` separates out. Frcacts rapidly with `CH_3COCl` to give back D. On the other hand. E on boiling with alkali followed by acidilication gives a white solid `G (C_7H_6O_ 2)`. Identify
A - G.
(b) Carry out the following transformation in not more than three steps.
1 - butync -> 2 - pentanone
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)