1.

Which one of the following permanga nometric titrations does not give satisfactory results ?

Answer»

`2KMnO_4 + 5H_2C_2O_4 + 3H_2SO_4 rarr ?`
`2KMnO_4 + 10 FeSO_4 + 8H_2SO_4 rarr ?`
`10 KL + 2KMnO_4 + 16HCl rarr ?`
`2KMnO_4 + 3 MnSO_4 + 2H_2O rarr ?`

Answer :C


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