Question: why kmno4 is stronger than k2cr2o7?
Answer: The KMnO4 is stronger oxidizing agent than k2Cr2O7 because due to its higher reduction potential since as we know that the compound having higher reduction potential behaves as best oxidizing agent . Here reduction potential value of KMnO4 is +1.52V and K2Cr2O7 has +1.33V .