In a pair of isomers of molecular formula C ₅ H ₈ , both the compounds undergo catalytic hydrogenation to form compounds of molecular formula C ₅ H ₁₀ . On ozonolysis followed by oxidative workup ( H ₂ O ₂ ) , one of the isomers gives a diacid ( C ₅ H ₈ O ₄ ) while the other isomer gives a ketoacid ( C ₅ H ₈ O ₃ ) . The pair/s which give/s above set of reactions is/are