The option (s) with only amphoteric oxid...

The option (s) with only amphoteric oxides is (are)

`CrO_(3),BeO,SnO,SnO_(2)`

`ZnO,Al_(2)O_(3),PbO,PbO_(2)`

`NO,B_(2)O_(3),PbO,SnO_(2)`

`Cr_(2)O_(3),CrO,SnO,PbO`

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The correct Answer is:

A, B

NO is neutral `CrO` is basic while `B_(2)O_(3)` is acidic. Therefore, all the oxides included in options (a) and (b) are amphoteric nature.

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