1.

Which of the following are amphoteric oxides ?Mn_(2)O_(7) , CrO_(3) , Cr_(2)O_(3) , CrO, V_(2)O_(5), V_(2) O_(4)

Answer»

`V_(2)O_(5), Cr_(2)o_(3)`
`Mn_(2)O_(7),CrO_(3)`
`CrO, V_(2)O_(5)`
`V_(2)O_(5),V_(2)O_(5)`

Solution :OXIDES in the lower OXIDATION state are basic and in the higher oxidation state, they are acidic. In the intermediate state, they areamphoteric.


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