An organic compound `'A' (C_(4)H_(10)O)` is optically active. On mild oxidation, it gives a compound `'B' (C_(4)H_(8)O)` but upon vigorous oxidation, it gives another compound `'C' (C_(3)H_(6)O_(2))`. The compound `'C'` along with `'D'` are also formed from `'B'` by reacting with iodine in the presence of alkali. Deduce the structures of `'A', 'B', 'C'` and `'D'`.

Compound 'A' with the formula C_(3)H_(8)O on vigorous oxidation produces an acid C_(3)H_(6)O_(2) . 'A' is

The compound F(C_(6)H_(12)O) on oxidative ozonolysis yirlds acetic acid and a compound (G) (C_(4)H_(8)O_(3)) . The new compound (G) on heating gives:

An organic compound A (C_(4)H_(10)O ) reacts with HI giving a compound B( C_(4)H_(9)l ), which on reduction gives n-butane. On oxidation 'A' gives a compound C(C_(4)H_(8)O ) and then an acid D(C_(4)H_(8)O_(2)) . Deduce the structures of A, B, C and D and mention their IUPAC names.

An organic compound (A) (C_(8)H_(14)O) forms an oxime and gives a positive haloform reaction. On ozonolysis, it gives acetone and a compound (B) (C_(5)H_(8)O_(2)) . (B) forms a dioxime and on subjecting to oxidation reaction gives an acid (C ) (C_(4)H_(6)O_(4)) . On treatment with excess of ammonia and strong heating, (C ) gives a neutral compound (D) (C_(4)H_(5)O_(2)N) . (D) on distillation with zinc dust forms pyrrloe. Suggest the possible structures of (A), (B), (C ), and (D). Explain the chemical reactions involved.