1.

In which of the following compounds an element exhibits two different oxidation states ?

Answer»

`NH_2OH`
`NH_4NO_3`
`N_2H_4`
`N_3H`

Solution :`NH_4NO_3` EXISTS as `NH_4^+ and NO_3^(-)` IONS. The O.N. of N in `NH_4^(+)` is - 3 and `NO_3^(-) , ` O.N. is +5.


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