Statement I: O – O bond energy is x kJ/mole but O = O energy is greater than 2x kJ/mole.Statement II : Sigma bond is weaker than pi bond.

General explaination.....O - O single bond enthalpy is x kJ/mole. We know in O = O, One is a singma bond and other is a Pi bond. Pi bond is generally weaker than a sigma bond.So O = O bond enthalpy must be lesser than 2x KJ/mole.but  O.....-O..... single bond is extremely weak due to the repulsions between the lone pairs on small oxygen atoms. Thus ,the sum of  two O - O single bond enthalpies {2x} is lesser  than the O = O double bond enthalpy.I is tureIn general single bond is stronger than pi bond∴ II is false