`P` and `Q` are isomers of dicarboxylic acid `C_(4)H_(4)O_(4)`. Bothdecolorize `Br_(2)//H_(2)O`. On heating, `P` forms the cyclic anhydride. Upon treatment with dilute alkaline `KMnO_(4),P` as well as `Q` could produce one or more than one forms `S,T` and `U`.
Compounds formed from `P` and `Q` are, respectively

P and Q are isomers of dicarboxylic acid C_(4)H_(4)O_(4) . Both decolorize Br_(2)//H_(2)O . On heating, P forms the cyclic anydride. Upon treatment with dilute alkaline KMnO_(4) , p as well as Q could produce one or more than one from the S,T and U Compounds formed from P and Q are, respectively:

P and Q are isomer of dicraboxylic acid C_(4)H_(4)O_(4) Both decolourixe Br_(2)//H_(2)O . On heating , P forms the cyclic anhydride. Upon treatment with duilute alkaline KMnO_(4) . P as well a Q could produce one or more than one from S,T and U. Compounds formed P and Q are, respectively

P and Q are isomers C_(4)H_(4)O_(4) of dicarboxylic acid both decolorise Br_(2)//H_(2)O . On heating P forms the cyclic anhydride. Upon treatment with dilute alkaline KMnO_(4) , P as well as Q could produce one or more than one form S, T and U Compounds formed from P and Q are respectively

P and Q are isomer of dicraboxylic acid C_(4)H_(4)O_(4) Both decolourixe Br_(2)//H_(2)O . On heating , P forms the cyclic anhydride. Upon treatment with duilute alkaline KMnO_(4) . P as well a Q could produce one or more than one from S,T and U. In the following reaction sequences V and W are respectively Qunderset(Delta)overset(H_(2)//Ni)rarrV

A substance (P) releases a gas (Q) on reaction with H_(2)O . (Q) decolourises Br_(2) water. (P) may be