JEE Mains Model Paper 21

2H2O2 → 2H2O + O2 and 8H2S + S the chemical equations suggest that H2S is more stable than H2S2 and H2O . As the S - H bond is weaker than O - H bond , H2O is more stable than H2S and H2O2 then H2S . Hence H2S2 is least stable.