Colouration of `Br_(2)//C Cl_(4)` will be discharged by

Colouration of Br_2// C CI_4 will be discharged by

An organic compound on treatment with Br_(2)//C Cl_(4) , gives a bromoderivative alkene. The compound will be

Propene on reaction with Br_(2) "in" C Cl_(4) yields

Propene on reaction with Br_(2) "in" C Cl_(4) yields

Acetylene with excess of Br_(2)//C Cl_(4) gives

Two compounds (X) and (Y) of the same molecular formula. C_(4)H_(6) gave the following reactions: i) Both discharged colour of Br_(2) in C(Cl_(4)) . ii) (X) gives a precipate with ammonicial AgNO_(3) and on oxidation gives propanoic acid and CO_(2) . iii) (Y) does not give precipitate with ammoniacal AgNO_(3) and on oxidation gives oxliac acid and CO_(2) . What is the structural formula of (X) and (Y).