Question

Two isomeric compounds $A$ and $B$ have the formula $C _{3} H _{6} Cl _{2} .$ With aq. $KOH$ solution $A$ gives propionaldehyde and $B$ gives acetone. Then $A$ and $B$ respectively are

• A. $CH _{3}- CCl _{2}- CH _{3}$ and $CH _{3}- CH _{2}- CHCl _{2}$
• B. $CH _{3}- CHCl - CHCl _{2}$ and $CH _{3}- CH _{2}- CHCl _{2}$
• C. $CH _{3}- CH _{2}- CHCl _{2}$ and $CH _{3}- CCl _{2}- CH _{3}$
• D. $CH _{3}- CHCl - CHCl _{2}$ and $CH _{3}- CCl _{2}- CH _{3}$

Answer 1

Answer: (C)

Terminal geminal dihalides give aldehydes and that of other geminal dihalides give ketones with aq. $KOH$.