A compound [X] discharges bromine water in $CC{I}_4$ . The compound neither gives any colour with $FeC{l}_3$ nor effervescences with aq, $NaHC{0}_3$  solution. However, its hydrolysate with cone. $KOH$ followed by acidification gives another compound Y which gives colour with $FeC{l}_3$  solution as well a effervescences of $C{O}_2$ with $NaHC{0}_3$ solution. Compounds X and Y respectively are.