Ketone (A), which indergoes halform reaction, give compound (B) on reduction. (B) on heating with H_(2)SO_(4) gives compound (C ), which forms mono-ozonide (D). (D) on hydrolysis in the presence of Zn dust gives only acetaldehyde. Identify (A). (B), and (C ). Write down the reactions involved.

Ketone (A), which indergoes halform reaction, give compound (B) on red

1.	Ketone (A), which indergoes halform reaction, give compound (B) on reduction. (B) on heating with H_(2)SO_(4) gives compound (C ), which forms mono-ozonide (D). (D) on hydrolysis in the presence of Zn dust gives only acetaldehyde. Identify (A). (B), and (C ). Write down the reactions involved.
Answer» Solution :Ketone `(A)` gives HALOFORM reaction, so it must contain `(Me-CO-)` group. Ketone on reduction gives `2^(@)` alcohol. (B), which gives alkene `(C )` with `H_(2)SO_(4)`. Alkene on ozonolysis FOLLOWED by reduction with `Zn` dust gives `MeCHO`. So, the structure of alkene `(C )` is: So `(A)` is: Butan-`2`-one, `(B)` is: Butan-`2`-ol, `(C )` is: Butan-`2`-one.